Date: Fri, 08 Feb 2008 23:38:12 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-performance@freebsd.org Subject: Re: Performance Tracker project update Message-ID: <foill0$dfn$1@ger.gmane.org> In-Reply-To: <967A7CF9-D9FE-454F-92E1-68D21CBDFA5E@mac.com> References: <4796C717.9000507@cederstrand.dk> <20080123193400.N63024@fledge.watson.org> <4797A245.7080202@cederstrand.dk> <20080123202433.E63024@fledge.watson.org> <4797A802.8060509@FreeBSD.org> <47A0BFE7.4070708@cederstrand.dk> <20080130190000.GA18333@lor.one-eyed-alien.net> <47AC15A5.5020009@cederstrand.dk> <20080208151756.GA35423@lor.one-eyed-alien.net> <foibab$a2g$1@ger.gmane.org> <9D27D745-2465-4FB2-B7E0-3C5DD411E9B9@mac.com> <foieub$mj6$1@ger.gmane.org> <967A7CF9-D9FE-454F-92E1-68D21CBDFA5E@mac.com>
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[-- Attachment #1 --] Chuck Swiger wrote: > On Feb 8, 2008, at 12:43 PM, Ivan Voras wrote: >>> Historically, the Python optimizer wasn't capable of doing much, >>> true, but the more recent versions of the optimizer can actually do >>> some peephole optimizations like algorithmic simplification and >>> constant folding: >>> http://docs.python.org/whatsnew/other-lang.html#SECTION0001320000000000000000 >>> >> >> A quick test with the built-in pystone mini-benchmark (taken out of >> the standard library so the optimization can be varied) yields [*]: >> >> python without -O : 5802.36 >> python with -O : 5781.39 > > That's ~ 0.4% difference, or low enough to be lost in the noise, agreed. Ah sorry, fatal omission: that's loops per second, and it's consistent across several runs of with and without -O. I.e. I'm getting _lower_ performance with -O :) [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHrNneldnAQVacBcgRAuIQAKDPeP3WnYpCnSbOl1XC6jqssBW9gwCgoohu AOsbWifo85uNFlEf7gRXz+A= =22ja -----END PGP SIGNATURE-----
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