From owner-freebsd-java Sun Nov 26 12:58:57 2000
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Date: Sun, 26 Nov 2000 16:03:26 -0500 (EST)
From: Chris BeHanna <behanna@zbzoom.net>
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To: java@freebsd.org
Subject: Re: Java et al
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On Tue, 21 Nov 2000, Mike Hoskins wrote:
> Excuse this if it's off-topic... I couldn't think of the best place to
> ask this, and I am running STABLE on all production machines, so...
>
> We have a lot of proprietary code written in Java running on Wintel
> boxes. There's been talk of migrating to Linux, and our initial tests
> show performance equal to NT 4.0 under the JDK/JVM's we've tested.
>
> Is there anyone out there running a lot of mission-critical
> (read: updating Oracle queues responsible for 911 dispatching) Java code
> under FreeBSD?
I don't know that anyone will certify FreeBSD as OK for mission-
critical systems, and Java expressly disclaims suitability for mission-
critical applications. IMHO, this is CYA more than anything else--no
one wants to be sued if air traffic control software written in Java
running on FreeBSD or some other platform routes two jumbo jets to the
same runway at the same time.
> If so, I'd appreciate JDK/JVM reccomendations, OS tuning tips (or relevant
> FAQs), etc. If not... I guess I'll resign myself to letting penguins
> slowly infiltrate my network (ack!).
On a system that has kernel threads (i.e., not FreeBSD 4.x, but
coming in 5.x, IIUC), IBM JDK 1.3 with HotSpot enabled is wicked fast
compared to Blackdown JDK 1.2.2 (note that Blackdown 1.3.0 just came
out recently, and I'm trying to get it up and running here--so far so
good, but it complains about alt sigstack allocations--apparently
Andrew Gallatin's Linux sighandling patches did not make it into 4.2).
On a platform that doesn't have native kernel threads (e.g., FreeBSD
4.x), HotSpot will still be faster than JDK 1.2.2 with sunwjit, but
the results will not be nearly as dramatic. For now, IIUC, ShuJIT is
the hot JIT to use on FreeBSD.
I am presently working on getting the native FreeBSD JDK 1.2.2
port to work, because I believe that will be the stable fallback to
use for other applications (e.g., Star Office). Blackdown JDK 1.3.0
will be an interesting exercise, but as I mentioned, I have to apply
Andrew Gallatin's patches to my kernel first.
FWIW, the Linux-JDK 1.2.2 port ran just dandy on 4.1.1-STABLE.
Note, however, that you'll have the same issues running Oracle on
FreeBSD that you have running JDK 1.3.0--namely, Oracle will expect
some Linux signal-handling capabilities that only exist in Andrew
Gallatin's patches.
--
Chris BeHanna
Software Engineer
behanna@bogus.zbzoom.net Remove "bogus" before responding.
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From owner-freebsd-java Mon Nov 27 21: 9: 8 2000
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If you install Sun's JDK1.3 for Linux, you can run the most recent release for Sun's Forte
Community Edition and develop for Java within a reasonably nice GUI. Here's how...
Edit the file $JAVA_HOME/jre/lib/font.properties to comment out references to fonts
containing the strings "symbol" and "adobe-fontspecific" by adding a "#" at the beginning
of the line. Don't forget the lines containing "CharToByteSymbol" too.
If you have installed the OpenJIT just-in-time-compiler, you will need to disable it
temporarily, as it causes problems for the installer. Typing "unset JAVA_COMPILER"
should suffice. Once the package is installed, it runs normally with the jit enabled.
Go to Sun's www.javasoft.com web site and find Forte Community Edition. Download the
Solaris package. It is a little over 12 megs. Install it by typing "sh forte_ce_1_0_2.sh"
and follow the directions from there.
--
________________________________________________________________________
Technology is dominated by those who manage what they do not understand.
http://www.netcom.com/~scrantr/index.html
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From owner-freebsd-java Tue Nov 28 2:21:24 2000
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From: Panagiotis Astithas <past@netmode.ntua.gr>
To: Chris BeHanna <behanna@zbzoom.net>
Cc: java@FreeBSD.ORG
Subject: Re: Java et al
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On Sun, Nov 26, 2000 at 04:03:26PM -0500, Chris BeHanna wrote:
> the results will not be nearly as dramatic. For now, IIUC, ShuJIT is
> the hot JIT to use on FreeBSD.
From the various comparisons that I have seen, my understanding is that
OpenJIT is the fastest, as long as you don't mind the increased startup
time.
-past
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From owner-freebsd-java Thu Nov 30 15:55:44 2000
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From: Ernst de Haan <ernst@jollem.com>
To: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Cc: Yura Cangea <yura@notepad.com>,
Alex Chudnovsky <chud73@yahoo.com>
Subject: Performance hint for JDK on FreeBSD
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Hi,
It seems that the startup of the JVM got a major performance boost when I
changed my font.properties to get rid of the annoying `Font not found'
messages. I went from a startup of ~ 2600 ms to around 500 ms. Does anyone
have similar experiences?
This applies to both the native FreeBSD JDK 1.2.2b10 and to the Sun Linux JDK
1.3.0_01.
Ernst
PS: My system is a P2-400, 256 MB, U2W, XFree86 4.0.1f, GeForce 2 MX.
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From owner-freebsd-java Thu Nov 30 16: 0:16 2000
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From: Mikhail Kruk <meshko@cs.brandeis.edu>
To: Ernst de Haan <ernst@jollem.com>
Cc: FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
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unfortunately makeing it start up faster does not solve the general
performance issues...
does anyone know if the patches needed to run IBM JDK are going to be
included in some future release? I don't feel like adding unsupported
functionality to the kernel but would really love to use IBM JDK.
Well, any exerpiences of running IBM JDK with those patches are welcome
too. Especially with 1.1.8 version, I find it faster and more reliable.
mk
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From owner-freebsd-java Thu Nov 30 16: 1: 1 2000
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From: "Joe Shevland" <shevlandj@kpi.com.au>
To: "Ernst de Haan" <ernst@jollem.com>,
"FreeBSD Java mailing list" <freebsd-java@FreeBSD.ORG>
Subject: RE: Performance hint for JDK on FreeBSD
Date: Fri, 1 Dec 2000 11:00:26 +1100
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I'm not actually seeing these 'Font not found' messages; is this only if =
you're running under X (no X on my box)?
Regards,
Joe
> -----Original Message-----
> From: owner-freebsd-java@FreeBSD.ORG
> [mailto:owner-freebsd-java@FreeBSD.ORG]On Behalf Of Ernst de Haan
> Sent: Friday, 1 December 2000 10:55 AM
> To: FreeBSD Java mailing list
> Cc: Yura Cangea; Alex Chudnovsky
> Subject: Performance hint for JDK on FreeBSD
>=20
>=20
> Hi,
>=20
>=20
> It seems that the startup of the JVM got a major performance boost =
when I
> changed my font.properties to get rid of the annoying `Font not found'
> messages. I went from a startup of ~ 2600 ms to around 500 ms. Does =
anyone
> have similar experiences?
>=20
> This applies to both the native FreeBSD JDK 1.2.2b10 and to the=20
> Sun Linux JDK
> 1.3.0_01.
>=20
>=20
> Ernst
>=20
> PS: My system is a P2-400, 256 MB, U2W, XFree86 4.0.1f, GeForce 2 MX.
>=20
>=20
> To Unsubscribe: send mail to majordomo@FreeBSD.org
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>=20
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From owner-freebsd-java Thu Nov 30 16:27:57 2000
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Subject: Re: Performance hint for JDK on FreeBSD
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> unfortunately makeing it start up faster does not solve the general
> performance issues...
> does anyone know if the patches needed to run IBM JDK are going to be
> included in some future release?
Drew Gallatin merged a number of changes right after 4.2 was released.
I'm not sure if they work on the x86, but I'm running Compaq's Linux-JVM
on the Alpha they donated to the FreeBSD/JDK project, which should help
us 'bootstrap' a native build for FreeBSD.
Nate
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Date: Fri, 1 Dec 2000 13:27:10 +0200
From: Panagiotis Astithas <past@netmode.ntua.gr>
To: Joe Shevland <shevlandj@kpi.com.au>
Cc: Ernst de Haan <ernst@jollem.com>,
FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
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On Fri, Dec 01, 2000 at 11:00:26AM +1100, Joe Shevland wrote:
> I'm not actually seeing these 'Font not found' messages; is this only if you're running under X (no X on my box)?
Me neither. IIRC Greg fixed those a few versions ago. Or perhaps I
somehow managed to get those fonts? I have X 4.0.1, URW fonts and a
few TrueType fonts I came across.
-past
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From owner-freebsd-java Fri Dec 1 4:12:14 2000
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From: "Koster, K.J." <K.J.Koster@kpn.com>
Subject: RE: Performance hint for JDK on FreeBSD
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>
> > I'm not actually seeing these 'Font not found' messages; is
> this only if you're running under X (no X on my box)?
>
The font errors are Swing-related, so non-Swing applications won't produce
them. (Dunno about AWT).
>
> Me neither. IIRC Greg fixed those a few versions ago. Or perhaps I
> somehow managed to get those fonts? I have X 4.0.1, URW fonts and a
> few TrueType fonts I came across.
>
A fix is described on my web site:
http://www.kjkoster.org/java/index.jsp?page=content/howto.jsp&id=hd06
I never knew that it is a 400% performance boost, which does sound a little
strange. I'm really curious why that is.
Kees Jan
================================================
You are only young once,
but you can stay immature all your life.
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From owner-freebsd-java Fri Dec 1 8:55:15 2000
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From: Ernst de Haan <ernst@jollem.com>
To: "Koster, K.J." <K.J.Koster@kpn.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
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Hallo Kees-Jan! ;)
> A fix is described on my web site:
> http://www.kjkoster.org/java/index.jsp?page=content/howto.jsp&id=hd06
Thanks, I used to have the URW fonts installed when I ran XFree86 3.3.x, but
now I'm on 4.0.1f.
Only comment I have is that the fonts seem a little largish, can I compensate
for that somehow?
> I never knew that it is a 400% performance boost, which does sound a little
> strange. I'm really curious why that is.
Well, I turned on profiling, and found that most of the time is spent in X11
specific Java code. I will re-run the tests after I temporarily disabled your
suggested modifications.
Ernst
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From owner-freebsd-java Fri Dec 1 9:51:24 2000
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Date: Fri, 1 Dec 2000 18:50:31 +0100
From: Ernst de Haan <ernst@jollem.com>
To: "Koster, K.J." <K.J.Koster@kpn.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001201185031.A58178@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl>
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Heya Kees-Jan and all,
> > I never knew that it is a 400% performance boost, which does sound a little
> > strange. I'm really curious why that is.
>
> Well, I turned on profiling, and found that most of the time is spent in X11
> specific Java code. I will re-run the tests after I temporarily disabled your
> suggested modifications.
Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
10 when I dont have the modified font.properties file:
CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
rank self accum count trace method
1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
3 12.93% 53.69% 253952 182 java/lang/String.charAt
4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
5 1.44% 57.38% 8258 938 java/lang/String.<init>
6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
The traces for the top 3 are:
TRACE 1304:
sun/io/CharToByteSingleByte.getNative
sun/io/CharToByteSingleByte.convert
sun/awt/font/NativeFontWrapper.registerFonts
sun/awt/X11GraphicsEnvironment.registerNativeFonts
TRACE 1399:
sun/io/CharToByteSingleByte.convert
sun/awt/font/NativeFontWrapper.registerFonts
sun/awt/X11GraphicsEnvironment.registerNativeFonts
sun/java2d/SunGraphicsEnvironment$2.run
TRACE 182:
java/lang/String.charAt
sun/io/CharToByteSingleByte.getNative
sun/io/CharToByteSingleByte.convert
sun/awt/font/NativeFontWrapper.registerFonts
Here are the startup times for AWT:
Original: w/modifications:
---------------- ------------------------------
run 1: 2607 ms 608 ms
run 2: 2579 ms 573 ms
run 3: 2583 ms 601 ms
run 4: 2713 ms 599 ms
Note: The only modifications performed are adding the URW fonts to my
XF86Config and using the font.properties from Kees-Jan's site instead of the
original one!
Here is the top 10 of CPU time eaters for my application with the
modifications applied:
CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
rank self accum count trace method
1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
3 2.25% 7.91% 5 158 java/util/Properties.load
4 1.98% 9.89% 6356 987 java/lang/String.indexOf
5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
8 1.42% 16.27% 8590 675 java/lang/String.charAt
9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
10 1.36% 19.04% 8133 207 java/lang/String.charAt
Now all of a sudden my application code comes on top. And that's the way I
like it! :)
IMHO these results are quite amazing!
Next thing I'll do is write a small program that will do nothing but starting
AWT and displaying the startup times, as the current results are obtained by
looking at the log output of my own Swing application.
Ernst
To Unsubscribe: send mail to majordomo@FreeBSD.org
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From owner-freebsd-java Fri Dec 1 10: 9:24 2000
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Date: Fri, 1 Dec 2000 19:08:27 +0100
From: Ernst de Haan <ernst@jollem.com>
To: "Koster, K.J." <K.J.Koster@kpn.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001201190827.A59487@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl>
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Ok, the votes are counted, the results are in :) I've written a small Java
program I wrote to produce new test results that should be reproducable on
other (FreeBSD) systems too. I've included the .java file in an attachment,
and, for your convenience, the AWTTest.class file.
In the program I do 2 things. First I attempt to load the class
java.awt.Toolkit. Then I invoke the class function getDefaultToolkit(), which
apparently initializes AWT.
Here are the results (I did only one run):
Original Applied suggested modifications
-------- -------------------------------
Class load: 155 ms. 154 ms.
AWT startup: 2454 ms. 437 ms.
That's quite a difference, isn't it? :) Could anyone confirm these results for
his/her system?
Ernst
Ernst de Haan wrote:
> Heya Kees-Jan and all,
>
>
> > > I never knew that it is a 400% performance boost, which does sound a little
> > > strange. I'm really curious why that is.
> >
> > Well, I turned on profiling, and found that most of the time is spent in X11
> > specific Java code. I will re-run the tests after I temporarily disabled your
> > suggested modifications.
>
> Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> 10 when I dont have the modified font.properties file:
>
> CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> rank self accum count trace method
> 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
>
> The traces for the top 3 are:
>
> TRACE 1304:
> sun/io/CharToByteSingleByte.getNative
> sun/io/CharToByteSingleByte.convert
> sun/awt/font/NativeFontWrapper.registerFonts
> sun/awt/X11GraphicsEnvironment.registerNativeFonts
>
> TRACE 1399:
> sun/io/CharToByteSingleByte.convert
> sun/awt/font/NativeFontWrapper.registerFonts
> sun/awt/X11GraphicsEnvironment.registerNativeFonts
> sun/java2d/SunGraphicsEnvironment$2.run
>
> TRACE 182:
> java/lang/String.charAt
> sun/io/CharToByteSingleByte.getNative
> sun/io/CharToByteSingleByte.convert
> sun/awt/font/NativeFontWrapper.registerFonts
>
> Here are the startup times for AWT:
>
> Original: w/modifications:
> ---------------- ------------------------------
> run 1: 2607 ms 608 ms
> run 2: 2579 ms 573 ms
> run 3: 2583 ms 601 ms
> run 4: 2713 ms 599 ms
>
> Note: The only modifications performed are adding the URW fonts to my
> XF86Config and using the font.properties from Kees-Jan's site instead of the
> original one!
>
> Here is the top 10 of CPU time eaters for my application with the
> modifications applied:
>
> CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> rank self accum count trace method
> 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> 3 2.25% 7.91% 5 158 java/util/Properties.load
> 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> 10 1.36% 19.04% 8133 207 java/lang/String.charAt
>
> Now all of a sudden my application code comes on top. And that's the way I
> like it! :)
>
> IMHO these results are quite amazing!
>
> Next thing I'll do is write a small program that will do nothing but starting
> AWT and displaying the startup times, as the current results are obtained by
> looking at the log output of my own Swing application.
>
>
> Ernst
>
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-java" in the body of the message
>
--PNTmBPCT7hxwcZjr
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="AWTTest.java"
public class AWTTest {
public static void main(String[] args) throws Exception {
// Load the Toolkit class from the AWT package
long beforeClassLoad = System.currentTimeMillis();
Class c = Class.forName("java.awt.Toolkit");
long afterClassLoad = System.currentTimeMillis();
// Get the getDefaultToolkit() class function
java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
// Invoke the class function
long beforeInvoke = System.currentTimeMillis();
m.invoke(null, null);
long afterInvoke = System.currentTimeMillis();
long t1 = afterClassLoad - beforeClassLoad;
long t2 = afterInvoke - beforeInvoke;
System.out.println("Class load took: " + t1 + " ms.");
System.out.println("AWT startup took: " + t2 + " ms.");
System.exit(0);
}
}
--PNTmBPCT7hxwcZjr
Content-Type: application/octet-stream
Content-Disposition: attachment; filename="AWTTest.class"
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--PNTmBPCT7hxwcZjr--
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To: Ernst de Haan <ernst@jollem.com>
Cc: "Koster, K.J." <K.J.Koster@kpn.com>,
FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
In-Reply-To: <20001201190827.A59487@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com>
<20001201174923.A57144@c187104187.telekabel.chello.nl>
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<20001201190827.A59487@c187104187.telekabel.chello.nl>
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Reply-To: nate@yogotech.com (Nate Williams)
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X-Loop: FreeBSD.org
> Ok, the votes are counted, the results are in :) I've written a small Java
> program I wrote to produce new test results that should be reproducable on
> other (FreeBSD) systems too. I've included the .java file in an attachment,
> and, for your convenience, the AWTTest.class file.
For those of us who are absolutely paranoid, can you send the original
.java file? I *hate* running binaries on my system that I know nothing
about. (No offense, to Ernst in implying that he's trying to breakin).
Also, having the source allows it to be used for profiling when we do
additional ports and such.
Thanks!
Nate
> Ernst de Haan wrote:
> > Heya Kees-Jan and all,
> >
> >
> > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > strange. I'm really curious why that is.
> > >
> > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > suggested modifications.
> >
> > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > 10 when I dont have the modified font.properties file:
> >
> > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > rank self accum count trace method
> > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> >
> > The traces for the top 3 are:
> >
> > TRACE 1304:
> > sun/io/CharToByteSingleByte.getNative
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> >
> > TRACE 1399:
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > sun/java2d/SunGraphicsEnvironment$2.run
> >
> > TRACE 182:
> > java/lang/String.charAt
> > sun/io/CharToByteSingleByte.getNative
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> >
> > Here are the startup times for AWT:
> >
> > Original: w/modifications:
> > ---------------- ------------------------------
> > run 1: 2607 ms 608 ms
> > run 2: 2579 ms 573 ms
> > run 3: 2583 ms 601 ms
> > run 4: 2713 ms 599 ms
> >
> > Note: The only modifications performed are adding the URW fonts to my
> > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > original one!
> >
> > Here is the top 10 of CPU time eaters for my application with the
> > modifications applied:
> >
> > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > rank self accum count trace method
> > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> >
> > Now all of a sudden my application code comes on top. And that's the way I
> > like it! :)
> >
> > IMHO these results are quite amazing!
> >
> > Next thing I'll do is write a small program that will do nothing but starting
> > AWT and displaying the startup times, as the current results are obtained by
> > looking at the log output of my own Swing application.
> >
> >
> > Ernst
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-java" in the body of the message
> >
> public class AWTTest {
>
> public static void main(String[] args) throws Exception {
>
> // Load the Toolkit class from the AWT package
> long beforeClassLoad = System.currentTimeMillis();
> Class c = Class.forName("java.awt.Toolkit");
> long afterClassLoad = System.currentTimeMillis();
>
> // Get the getDefaultToolkit() class function
> java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
>
> // Invoke the class function
> long beforeInvoke = System.currentTimeMillis();
> m.invoke(null, null);
> long afterInvoke = System.currentTimeMillis();
>
> long t1 = afterClassLoad - beforeClassLoad;
> long t2 = afterInvoke - beforeInvoke;
>
> System.out.println("Class load took: " + t1 + " ms.");
> System.out.println("AWT startup took: " + t2 + " ms.");
> System.exit(0);
> }
> }
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 10:24:41 2000
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Date: Fri, 1 Dec 2000 19:23:13 +0100
From: Ernst de Haan <ernst@jollem.com>
To: Nate Williams <nate@yogotech.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001201192313.A59625@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl> <20001201190827.A59487@c187104187.telekabel.chello.nl> <14887.59899.440931.811907@nomad.yogotech.com>
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In-Reply-To: <14887.59899.440931.811907@nomad.yogotech.com>; from nate@yogotech.com on Fri, Dec 01, 2000 at 11:12:11AM -0700
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Look twice, it's there :)
Nate Williams wrote:
> > Ok, the votes are counted, the results are in :) I've written a small Java
> > program I wrote to produce new test results that should be reproducable on
> > other (FreeBSD) systems too. I've included the .java file in an attachment,
> > and, for your convenience, the AWTTest.class file.
>
> For those of us who are absolutely paranoid, can you send the original
> .java file? I *hate* running binaries on my system that I know nothing
> about. (No offense, to Ernst in implying that he's trying to breakin).
>
> Also, having the source allows it to be used for profiling when we do
> additional ports and such.
>
> Thanks!
>
>
> Nate
>
> > Ernst de Haan wrote:
> > > Heya Kees-Jan and all,
> > >
> > >
> > > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > > strange. I'm really curious why that is.
> > > >
> > > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > > suggested modifications.
> > >
> > > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > > 10 when I dont have the modified font.properties file:
> > >
> > > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > > rank self accum count trace method
> > > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> > >
> > > The traces for the top 3 are:
> > >
> > > TRACE 1304:
> > > sun/io/CharToByteSingleByte.getNative
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > >
> > > TRACE 1399:
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > sun/java2d/SunGraphicsEnvironment$2.run
> > >
> > > TRACE 182:
> > > java/lang/String.charAt
> > > sun/io/CharToByteSingleByte.getNative
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > >
> > > Here are the startup times for AWT:
> > >
> > > Original: w/modifications:
> > > ---------------- ------------------------------
> > > run 1: 2607 ms 608 ms
> > > run 2: 2579 ms 573 ms
> > > run 3: 2583 ms 601 ms
> > > run 4: 2713 ms 599 ms
> > >
> > > Note: The only modifications performed are adding the URW fonts to my
> > > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > > original one!
> > >
> > > Here is the top 10 of CPU time eaters for my application with the
> > > modifications applied:
> > >
> > > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > > rank self accum count trace method
> > > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> > >
> > > Now all of a sudden my application code comes on top. And that's the way I
> > > like it! :)
> > >
> > > IMHO these results are quite amazing!
> > >
> > > Next thing I'll do is write a small program that will do nothing but starting
> > > AWT and displaying the startup times, as the current results are obtained by
> > > looking at the log output of my own Swing application.
> > >
> > >
> > > Ernst
> > >
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-java" in the body of the message
> > >
> > public class AWTTest {
> >
> > public static void main(String[] args) throws Exception {
> >
> > // Load the Toolkit class from the AWT package
> > long beforeClassLoad = System.currentTimeMillis();
> > Class c = Class.forName("java.awt.Toolkit");
> > long afterClassLoad = System.currentTimeMillis();
> >
> > // Get the getDefaultToolkit() class function
> > java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
> >
> > // Invoke the class function
> > long beforeInvoke = System.currentTimeMillis();
> > m.invoke(null, null);
> > long afterInvoke = System.currentTimeMillis();
> >
> > long t1 = afterClassLoad - beforeClassLoad;
> > long t2 = afterInvoke - beforeInvoke;
> >
> > System.out.println("Class load took: " + t1 + " ms.");
> > System.out.println("AWT startup took: " + t2 + " ms.");
> > System.exit(0);
> > }
> > }
>
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 12: 6: 2 2000
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To: Ernst de Haan <ernst@jollem.com>
Cc: "Koster, K.J." <K.J.Koster@kpn.com>,
FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
In-Reply-To: <20001201190827.A59487@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com>
<20001201174923.A57144@c187104187.telekabel.chello.nl>
<20001201185031.A58178@c187104187.telekabel.chello.nl>
<20001201190827.A59487@c187104187.telekabel.chello.nl>
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> Ok, the votes are counted, the results are in :) I've written a small Java
> program I wrote to produce new test results that should be reproducable on
> other (FreeBSD) systems too. I've included the .java file in an attachment,
> and, for your convenience, the AWTTest.class file.
>
Question: Are you running this program on your 'local' client (with the
DISPLAY environment variable set to :0)? If not, the AWT startup will
be greatly effected, since AWT startup does some X stuff behind the
scenes, which may take longer if it involves network traffic.
> In the program I do 2 things. First I attempt to load the class
> java.awt.Toolkit. Then I invoke the class function getDefaultToolkit(), which
> apparently initializes AWT.
>
> Here are the results (I did only one run):
>
> Original Applied suggested modifications
> -------- -------------------------------
> Class load: 155 ms. 154 ms.
> AWT startup: 2454 ms. 437 ms.
>
> That's quite a difference, isn't it? :) Could anyone confirm these
> results for his/her system?
Running JDK1.1.8 on my box I get:
nomad:~/roof/dpr/src/dpr % java AWTTest
Class load took: 8 ms.
AWT startup took: 24 ms.
Pretty darn quickly, but it's a fairly speedy box. I won't post the
Alpha numbers because I'm doing all the X stuff remotely.
Nate
> Ernst de Haan wrote:
> > Heya Kees-Jan and all,
> >
> >
> > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > strange. I'm really curious why that is.
> > >
> > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > suggested modifications.
> >
> > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > 10 when I dont have the modified font.properties file:
> >
> > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > rank self accum count trace method
> > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> >
> > The traces for the top 3 are:
> >
> > TRACE 1304:
> > sun/io/CharToByteSingleByte.getNative
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> >
> > TRACE 1399:
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > sun/java2d/SunGraphicsEnvironment$2.run
> >
> > TRACE 182:
> > java/lang/String.charAt
> > sun/io/CharToByteSingleByte.getNative
> > sun/io/CharToByteSingleByte.convert
> > sun/awt/font/NativeFontWrapper.registerFonts
> >
> > Here are the startup times for AWT:
> >
> > Original: w/modifications:
> > ---------------- ------------------------------
> > run 1: 2607 ms 608 ms
> > run 2: 2579 ms 573 ms
> > run 3: 2583 ms 601 ms
> > run 4: 2713 ms 599 ms
> >
> > Note: The only modifications performed are adding the URW fonts to my
> > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > original one!
> >
> > Here is the top 10 of CPU time eaters for my application with the
> > modifications applied:
> >
> > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > rank self accum count trace method
> > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> >
> > Now all of a sudden my application code comes on top. And that's the way I
> > like it! :)
> >
> > IMHO these results are quite amazing!
> >
> > Next thing I'll do is write a small program that will do nothing but starting
> > AWT and displaying the startup times, as the current results are obtained by
> > looking at the log output of my own Swing application.
> >
> >
> > Ernst
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-java" in the body of the message
> >
> public class AWTTest {
>
> public static void main(String[] args) throws Exception {
>
> // Load the Toolkit class from the AWT package
> long beforeClassLoad = System.currentTimeMillis();
> Class c = Class.forName("java.awt.Toolkit");
> long afterClassLoad = System.currentTimeMillis();
>
> // Get the getDefaultToolkit() class function
> java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
>
> // Invoke the class function
> long beforeInvoke = System.currentTimeMillis();
> m.invoke(null, null);
> long afterInvoke = System.currentTimeMillis();
>
> long t1 = afterClassLoad - beforeClassLoad;
> long t2 = afterInvoke - beforeInvoke;
>
> System.out.println("Class load took: " + t1 + " ms.");
> System.out.println("AWT startup took: " + t2 + " ms.");
> System.exit(0);
> }
> }
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 16: 8: 0 2000
Delivered-To: freebsd-java@freebsd.org
Received: from heinz.jollem.com (c104187.upc-c.chello.nl [212.187.104.187])
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Date: Sat, 2 Dec 2000 01:06:59 +0100
From: Ernst de Haan <ernst@jollem.com>
To: Nate Williams <nate@yogotech.com>
Cc: FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001202010659.A61295@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl> <20001201190827.A59487@c187104187.telekabel.chello.nl> <14888.1179.861868.150322@nomad.yogotech.com>
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In-Reply-To: <14888.1179.861868.150322@nomad.yogotech.com>; from nate@yogotech.com on Fri, Dec 01, 2000 at 01:05:47PM -0700
Sender: owner-freebsd-java@FreeBSD.ORG
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Hi Nate,
Yes, I'm doing the tests locally on a P2-400 system, recent FreeBSD 4.2-S, 256
MB internal, XFree86 4.0.1f, FreeBSD JDK 1.2.2b10, no JIT.
Those numbers for JDK 1.1 are pretty nifty! Wow, I should test that too! Your
JDK 1.1 port seems very resource-effective!
Ernst
Nate Williams wrote:
> > Ok, the votes are counted, the results are in :) I've written a small Java
> > program I wrote to produce new test results that should be reproducable on
> > other (FreeBSD) systems too. I've included the .java file in an attachment,
> > and, for your convenience, the AWTTest.class file.
> >
>
> Question: Are you running this program on your 'local' client (with the
> DISPLAY environment variable set to :0)? If not, the AWT startup will
> be greatly effected, since AWT startup does some X stuff behind the
> scenes, which may take longer if it involves network traffic.
>
> > In the program I do 2 things. First I attempt to load the class
> > java.awt.Toolkit. Then I invoke the class function getDefaultToolkit(), which
> > apparently initializes AWT.
> >
> > Here are the results (I did only one run):
> >
> > Original Applied suggested modifications
> > -------- -------------------------------
> > Class load: 155 ms. 154 ms.
> > AWT startup: 2454 ms. 437 ms.
> >
> > That's quite a difference, isn't it? :) Could anyone confirm these
> > results for his/her system?
>
> Running JDK1.1.8 on my box I get:
> nomad:~/roof/dpr/src/dpr % java AWTTest
> Class load took: 8 ms.
> AWT startup took: 24 ms.
>
> Pretty darn quickly, but it's a fairly speedy box. I won't post the
> Alpha numbers because I'm doing all the X stuff remotely.
>
>
> Nate
>
> > Ernst de Haan wrote:
> > > Heya Kees-Jan and all,
> > >
> > >
> > > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > > strange. I'm really curious why that is.
> > > >
> > > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > > suggested modifications.
> > >
> > > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > > 10 when I dont have the modified font.properties file:
> > >
> > > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > > rank self accum count trace method
> > > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> > >
> > > The traces for the top 3 are:
> > >
> > > TRACE 1304:
> > > sun/io/CharToByteSingleByte.getNative
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > >
> > > TRACE 1399:
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > sun/java2d/SunGraphicsEnvironment$2.run
> > >
> > > TRACE 182:
> > > java/lang/String.charAt
> > > sun/io/CharToByteSingleByte.getNative
> > > sun/io/CharToByteSingleByte.convert
> > > sun/awt/font/NativeFontWrapper.registerFonts
> > >
> > > Here are the startup times for AWT:
> > >
> > > Original: w/modifications:
> > > ---------------- ------------------------------
> > > run 1: 2607 ms 608 ms
> > > run 2: 2579 ms 573 ms
> > > run 3: 2583 ms 601 ms
> > > run 4: 2713 ms 599 ms
> > >
> > > Note: The only modifications performed are adding the URW fonts to my
> > > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > > original one!
> > >
> > > Here is the top 10 of CPU time eaters for my application with the
> > > modifications applied:
> > >
> > > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > > rank self accum count trace method
> > > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> > >
> > > Now all of a sudden my application code comes on top. And that's the way I
> > > like it! :)
> > >
> > > IMHO these results are quite amazing!
> > >
> > > Next thing I'll do is write a small program that will do nothing but starting
> > > AWT and displaying the startup times, as the current results are obtained by
> > > looking at the log output of my own Swing application.
> > >
> > >
> > > Ernst
> > >
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-java" in the body of the message
> > >
> > public class AWTTest {
> >
> > public static void main(String[] args) throws Exception {
> >
> > // Load the Toolkit class from the AWT package
> > long beforeClassLoad = System.currentTimeMillis();
> > Class c = Class.forName("java.awt.Toolkit");
> > long afterClassLoad = System.currentTimeMillis();
> >
> > // Get the getDefaultToolkit() class function
> > java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
> >
> > // Invoke the class function
> > long beforeInvoke = System.currentTimeMillis();
> > m.invoke(null, null);
> > long afterInvoke = System.currentTimeMillis();
> >
> > long t1 = afterClassLoad - beforeClassLoad;
> > long t2 = afterInvoke - beforeInvoke;
> >
> > System.out.println("Class load took: " + t1 + " ms.");
> > System.out.println("AWT startup took: " + t2 + " ms.");
> > System.exit(0);
> > }
> > }
>
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 16:37:52 2000
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Date: Sat, 2 Dec 2000 01:36:54 +0100
From: Ernst de Haan <ernst@jollem.com>
To: Nate Williams <nate@yogotech.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001202013654.A61526@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl> <20001201190827.A59487@c187104187.telekabel.chello.nl> <14887.59899.440931.811907@nomad.yogotech.com> <20001201192313.A59625@c187104187.telekabel.chello.nl>
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Ok, I tested the JDK 1.1.8 with the AWTTest utility, and I wrote a new program
to see if the creation of a java.awt.Frame would perhaps take a longer amount
of time on 1.1.8. Not. It seems JDK 1.1.8 just perhaps heaps better than
1.2.2...
I tested with a number of JDK's, all on my P2-400, 256 MB, 16 bit-color (!),
XFree86 4.0.1f:
* JDK 1.1.8/FreeBSD
* JDK 1.2.2b9/FreeBSD
* JDK 1.2.2b10/FreeBSD
* JDK 1.3.0_01/Linux (Sun)
* JDK 1.2.2rc4/Linux (Blackdown)
Here's three tables with run results, the column headers contain the run #.
Class load 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 46 | 47 | 45 | 46 |
1.2.2b9/FreeBSD | 142 | 142 | 142 | 142 |
1.2.2b10/FreeBSD | 167 | 167 | 168 | 168 |
1.3.0_01/Linux (Sun) | 443 | 437 | 437 | 438 |
1.2.2rc4/Linux (Blackdown) | 315 | 313 | 315 | 314 |
AWT startup 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 44 | 44 | 43 | 42 |
1.2.2b9/FreeBSD | 444 | 444 | 445 | 455 |
1.2.2b10/FreeBSD | 437 | 438 | 444 | 451 |
1.3.0_01/Linux (Sun) | 415 | 415 | 413 | 414 |
1.2.2rc4/Linux (Blackdown) | 1064 | 1070 | 1067 | 1063 |
Frame create 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 17 | 19 | 17 | 18 |
1.2.2b9/FreeBSD | 13 | 13 | 14 | 14 |
1.2.2b10/FreeBSD | 11 | 11 | 12 | 12 |
1.3.0_01/Linux (Sun) | 12 | 12 | 12 | 12 |
1.2.2rc4/Linux (Blackdown) | 11 | 11 | 11 | 11 |
What surprises me most is that the native 1.1.8 was so fast. And I wonder why
the native 1.2.2b10 is just a bit slower than the older b9.
Ernst
Ernst de Haan wrote:
> Look twice, it's there :)
>
> Nate Williams wrote:
> > > Ok, the votes are counted, the results are in :) I've written a small Java
> > > program I wrote to produce new test results that should be reproducable on
> > > other (FreeBSD) systems too. I've included the .java file in an attachment,
> > > and, for your convenience, the AWTTest.class file.
> >
> > For those of us who are absolutely paranoid, can you send the original
> > .java file? I *hate* running binaries on my system that I know nothing
> > about. (No offense, to Ernst in implying that he's trying to breakin).
> >
> > Also, having the source allows it to be used for profiling when we do
> > additional ports and such.
> >
> > Thanks!
> >
> >
> > Nate
> >
> > > Ernst de Haan wrote:
> > > > Heya Kees-Jan and all,
> > > >
> > > >
> > > > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > > > strange. I'm really curious why that is.
> > > > >
> > > > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > > > suggested modifications.
> > > >
> > > > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > > > 10 when I dont have the modified font.properties file:
> > > >
> > > > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > > > rank self accum count trace method
> > > > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > > > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > > > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > > > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > > > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > > > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > > > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > > > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > > > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > > > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> > > >
> > > > The traces for the top 3 are:
> > > >
> > > > TRACE 1304:
> > > > sun/io/CharToByteSingleByte.getNative
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > >
> > > > TRACE 1399:
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > > sun/java2d/SunGraphicsEnvironment$2.run
> > > >
> > > > TRACE 182:
> > > > java/lang/String.charAt
> > > > sun/io/CharToByteSingleByte.getNative
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > >
> > > > Here are the startup times for AWT:
> > > >
> > > > Original: w/modifications:
> > > > ---------------- ------------------------------
> > > > run 1: 2607 ms 608 ms
> > > > run 2: 2579 ms 573 ms
> > > > run 3: 2583 ms 601 ms
> > > > run 4: 2713 ms 599 ms
> > > >
> > > > Note: The only modifications performed are adding the URW fonts to my
> > > > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > > > original one!
> > > >
> > > > Here is the top 10 of CPU time eaters for my application with the
> > > > modifications applied:
> > > >
> > > > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > > > rank self accum count trace method
> > > > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > > > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > > > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > > > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > > > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > > > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > > > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > > > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > > > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > > > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> > > >
> > > > Now all of a sudden my application code comes on top. And that's the way I
> > > > like it! :)
> > > >
> > > > IMHO these results are quite amazing!
> > > >
> > > > Next thing I'll do is write a small program that will do nothing but starting
> > > > AWT and displaying the startup times, as the current results are obtained by
> > > > looking at the log output of my own Swing application.
> > > >
> > > >
> > > > Ernst
> > > >
> > > >
> > > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > > with "unsubscribe freebsd-java" in the body of the message
> > > >
> > > public class AWTTest {
> > >
> > > public static void main(String[] args) throws Exception {
> > >
> > > // Load the Toolkit class from the AWT package
> > > long beforeClassLoad = System.currentTimeMillis();
> > > Class c = Class.forName("java.awt.Toolkit");
> > > long afterClassLoad = System.currentTimeMillis();
> > >
> > > // Get the getDefaultToolkit() class function
> > > java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
> > >
> > > // Invoke the class function
> > > long beforeInvoke = System.currentTimeMillis();
> > > m.invoke(null, null);
> > > long afterInvoke = System.currentTimeMillis();
> > >
> > > long t1 = afterClassLoad - beforeClassLoad;
> > > long t2 = afterInvoke - beforeInvoke;
> > >
> > > System.out.println("Class load took: " + t1 + " ms.");
> > > System.out.println("AWT startup took: " + t2 + " ms.");
> > > System.exit(0);
> > > }
> > > }
> >
>
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-java" in the body of the message
>
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 16:47:10 2000
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From: Mikhail Kruk <meshko@cs.brandeis.edu>
To: Ernst de Haan <ernst@jollem.com>
Cc: Nate Williams <nate@yogotech.com>,
FreeBSD Java mailing list <freebsd-java@FreeBSD.ORG>
Subject: Re: Performance hint for JDK on FreeBSD
In-Reply-To: <20001202013654.A61526@c187104187.telekabel.chello.nl>
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> Ok, I tested the JDK 1.1.8 with the AWTTest utility, and I wrote a new program
> to see if the creation of a java.awt.Frame would perhaps take a longer amount
> of time on 1.1.8. Not. It seems JDK 1.1.8 just perhaps heaps better than
> 1.2.2...
isn't it just known fact that 1.2 is all times worst in term of
performance? Using Windows as a references system (since I don't have
access to a single Sun machine), I've noticed that 1.1 is the fastest, 1.3
is acceptable and 1.2 is ... well, I try not to use it.
I agree that native FreeBSD port of 1.1.8 show very decent performance.
Even on an "averagely high" PIII-500 AWT functions show very-very good
performance.
So what I'm getting at is: do we need a 1.2 port or is it better to
concentrate on 1.3?
I might be missing something important of course...
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message
From owner-freebsd-java Fri Dec 1 17:32:30 2000
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Date: Sat, 2 Dec 2000 02:31:28 +0100
From: Ernst de Haan <ernst@jollem.com>
To: Nate Williams <nate@yogotech.com>
Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org>
Subject: Re: Performance hint for JDK on FreeBSD
Message-ID: <20001202023128.A62998@c187104187.telekabel.chello.nl>
References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl> <20001201190827.A59487@c187104187.telekabel.chello.nl> <14887.59899.440931.811907@nomad.yogotech.com> <20001201192313.A59625@c187104187.telekabel.chello.nl> <20001202013654.A61526@c187104187.telekabel.chello.nl>
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Oops, I didn't include the new AWTTest.java file :) Here it is. And I included
a compiled version too.
Ernst
Ernst de Haan wrote:
> Ok, I tested the JDK 1.1.8 with the AWTTest utility, and I wrote a new program
> to see if the creation of a java.awt.Frame would perhaps take a longer amount
> of time on 1.1.8. Not. It seems JDK 1.1.8 just perhaps heaps better than
> 1.2.2...
>
> I tested with a number of JDK's, all on my P2-400, 256 MB, 16 bit-color (!),
> XFree86 4.0.1f:
>
> * JDK 1.1.8/FreeBSD
> * JDK 1.2.2b9/FreeBSD
> * JDK 1.2.2b10/FreeBSD
> * JDK 1.3.0_01/Linux (Sun)
> * JDK 1.2.2rc4/Linux (Blackdown)
>
> Here's three tables with run results, the column headers contain the run #.
>
> Class load 1 2 3 4
> ---------------------------+------+------+------+------+
> 1.1.8/FreeBSD | 46 | 47 | 45 | 46 |
> 1.2.2b9/FreeBSD | 142 | 142 | 142 | 142 |
> 1.2.2b10/FreeBSD | 167 | 167 | 168 | 168 |
> 1.3.0_01/Linux (Sun) | 443 | 437 | 437 | 438 |
> 1.2.2rc4/Linux (Blackdown) | 315 | 313 | 315 | 314 |
>
> AWT startup 1 2 3 4
> ---------------------------+------+------+------+------+
> 1.1.8/FreeBSD | 44 | 44 | 43 | 42 |
> 1.2.2b9/FreeBSD | 444 | 444 | 445 | 455 |
> 1.2.2b10/FreeBSD | 437 | 438 | 444 | 451 |
> 1.3.0_01/Linux (Sun) | 415 | 415 | 413 | 414 |
> 1.2.2rc4/Linux (Blackdown) | 1064 | 1070 | 1067 | 1063 |
>
> Frame create 1 2 3 4
> ---------------------------+------+------+------+------+
> 1.1.8/FreeBSD | 17 | 19 | 17 | 18 |
> 1.2.2b9/FreeBSD | 13 | 13 | 14 | 14 |
> 1.2.2b10/FreeBSD | 11 | 11 | 12 | 12 |
> 1.3.0_01/Linux (Sun) | 12 | 12 | 12 | 12 |
> 1.2.2rc4/Linux (Blackdown) | 11 | 11 | 11 | 11 |
>
> What surprises me most is that the native 1.1.8 was so fast. And I wonder why
> the native 1.2.2b10 is just a bit slower than the older b9.
>
> Ernst
>
>
> Ernst de Haan wrote:
> > Look twice, it's there :)
> >
> > Nate Williams wrote:
> > > > Ok, the votes are counted, the results are in :) I've written a small Java
> > > > program I wrote to produce new test results that should be reproducable on
> > > > other (FreeBSD) systems too. I've included the .java file in an attachment,
> > > > and, for your convenience, the AWTTest.class file.
> > >
> > > For those of us who are absolutely paranoid, can you send the original
> > > .java file? I *hate* running binaries on my system that I know nothing
> > > about. (No offense, to Ernst in implying that he's trying to breakin).
> > >
> > > Also, having the source allows it to be used for profiling when we do
> > > additional ports and such.
> > >
> > > Thanks!
> > >
> > >
> > > Nate
> > >
> > > > Ernst de Haan wrote:
> > > > > Heya Kees-Jan and all,
> > > > >
> > > > >
> > > > > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > > > > strange. I'm really curious why that is.
> > > > > >
> > > > > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > > > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > > > > suggested modifications.
> > > > >
> > > > > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > > > > 10 when I dont have the modified font.properties file:
> > > > >
> > > > > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > > > > rank self accum count trace method
> > > > > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > > > > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > > > > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > > > > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > > > > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > > > > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > > > > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > > > > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > > > > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > > > > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> > > > >
> > > > > The traces for the top 3 are:
> > > > >
> > > > > TRACE 1304:
> > > > > sun/io/CharToByteSingleByte.getNative
> > > > > sun/io/CharToByteSingleByte.convert
> > > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > > >
> > > > > TRACE 1399:
> > > > > sun/io/CharToByteSingleByte.convert
> > > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > > > sun/java2d/SunGraphicsEnvironment$2.run
> > > > >
> > > > > TRACE 182:
> > > > > java/lang/String.charAt
> > > > > sun/io/CharToByteSingleByte.getNative
> > > > > sun/io/CharToByteSingleByte.convert
> > > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > >
> > > > > Here are the startup times for AWT:
> > > > >
> > > > > Original: w/modifications:
> > > > > ---------------- ------------------------------
> > > > > run 1: 2607 ms 608 ms
> > > > > run 2: 2579 ms 573 ms
> > > > > run 3: 2583 ms 601 ms
> > > > > run 4: 2713 ms 599 ms
> > > > >
> > > > > Note: The only modifications performed are adding the URW fonts to my
> > > > > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > > > > original one!
> > > > >
> > > > > Here is the top 10 of CPU time eaters for my application with the
> > > > > modifications applied:
> > > > >
> > > > > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > > > > rank self accum count trace method
> > > > > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > > > > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > > > > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > > > > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > > > > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > > > > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > > > > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > > > > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > > > > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > > > > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> > > > >
> > > > > Now all of a sudden my application code comes on top. And that's the way I
> > > > > like it! :)
> > > > >
> > > > > IMHO these results are quite amazing!
> > > > >
> > > > > Next thing I'll do is write a small program that will do nothing but starting
> > > > > AWT and displaying the startup times, as the current results are obtained by
> > > > > looking at the log output of my own Swing application.
> > > > >
> > > > >
> > > > > Ernst
> > > > >
> > > > >
> > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > > > with "unsubscribe freebsd-java" in the body of the message
> > > > >
> > > > public class AWTTest {
> > > >
> > > > public static void main(String[] args) throws Exception {
> > > >
> > > > // Load the Toolkit class from the AWT package
> > > > long beforeClassLoad = System.currentTimeMillis();
> > > > Class c = Class.forName("java.awt.Toolkit");
> > > > long afterClassLoad = System.currentTimeMillis();
> > > >
> > > > // Get the getDefaultToolkit() class function
> > > > java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
> > > >
> > > > // Invoke the class function
> > > > long beforeInvoke = System.currentTimeMillis();
> > > > m.invoke(null, null);
> > > > long afterInvoke = System.currentTimeMillis();
> > > >
> > > > long t1 = afterClassLoad - beforeClassLoad;
> > > > long t2 = afterInvoke - beforeInvoke;
> > > >
> > > > System.out.println("Class load took: " + t1 + " ms.");
> > > > System.out.println("AWT startup took: " + t2 + " ms.");
> > > > System.exit(0);
> > > > }
> > > > }
> > >
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-java" in the body of the message
> >
>
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-java" in the body of the message
>
--IJpNTDwzlM2Ie8A6
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="AWTTest.java"
public class AWTTest {
public static void main(String[] args) throws Exception {
// Load the Toolkit and Frame classes from the AWT package
long beforeClassLoad = System.currentTimeMillis();
Class c1 = Class.forName("java.awt.Toolkit");
Class c2 = Class.forName("java.awt.Frame");
long afterClassLoad = System.currentTimeMillis();
// Get the getDefaultToolkit() class function
java.lang.reflect.Method m1 = c1.getMethod("getDefaultToolkit", null);
java.lang.reflect.Constructor m2 = c2.getConstructor(null);
// Invoke the getDefaultToolkit() class function
long beforeInvoke = System.currentTimeMillis();
m1.invoke(null, null);
long afterInvoke = System.currentTimeMillis();
// Create a frame
long beforeFrameCreate = System.currentTimeMillis();
m2.newInstance(null);
long afterFrameCreate = System.currentTimeMillis();
long t1 = afterClassLoad - beforeClassLoad;
long t2 = afterInvoke - beforeInvoke;
long t3 = afterFrameCreate - beforeFrameCreate;
System.out.println("Class load took: " + t1 + " ms.");
System.out.println("AWT startup took: " + t2 + " ms.");
System.out.println("Frame create took: " + t3 + " ms.");
System.exit(0);
}
}
--IJpNTDwzlM2Ie8A6
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From owner-freebsd-java Sat Dec 2 3:39:30 2000
Delivered-To: freebsd-java@freebsd.org
Received: from cafe.muraoka.info.waseda.ac.jp (cafe.muraoka.info.waseda.ac.jp [133.9.68.49])
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Sat, 2 Dec 2000 20:37:59 +0900
Message-Id: <200012021137.UAA32417@cafe.muraoka.info.waseda.ac.jp>
To: Mikhail Kruk <meshko@cs.brandeis.edu>
Cc: freebsd-java@FreeBSD.ORG
Subject: Re: Performance hint for JDK on FreeBSD
In-reply-to: Your message of "Fri, 01 Dec 2000 19:46:54 EST."
<Pine.LNX.4.30.0012011942130.23343-100000@daedalus.cs.brandeis.edu>
Date: Sat, 02 Dec 2000 20:37:59 +0900
From: SHUDO Kazuyuki <shudoh@muraoka.info.waseda.ac.jp>
Sender: owner-freebsd-java@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org
Mikhail Kruk wrote:
> isn't it just known fact that 1.2 is all times worst in term of
> performance? Using Windows as a references system (since I don't have
> access to a single Sun machine), I've noticed that 1.1 is the fastest, 1.3
> is acceptable and 1.2 is ... well, I try not to use it.
A certain amount of functions that were written in C in 1.1
were rewritten in Java for 1.2.
This is one of reasons why 1.2 is slower than 1.1.
JVM of 1.2.2 loads over 150 classes when it starts up,
even though 1.1.8 loads about 50 classes.
This means that plenty of method invocations happen.
> So what I'm getting at is: do we need a 1.2 port or is it better to
> concentrate on 1.3?
1.3 loads more classes. But selective compilation technique and
other improvements made start-up time acceptable.
Kazuyuki SHUDO Happy Hacking!
Muraoka Lab., Grad. School of Sci. & Eng., Waseda Univ.
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