Date: Fri, 13 Nov 2015 08:49:09 +0000 From: Mark Blackman <mark@exonetric.com> To: Alfred Perlstein <alfred@freebsd.org> Cc: Vladimir Bogrecov <bogrecov@gmail.com>, python@freebsd.org, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Subject: Re: Python on FreeBSD is slower than on Linux Message-ID: <748D249D-51E8-4D56-8331-C9A1408218FB@exonetric.com> In-Reply-To: <5FA6299E-962D-4F4B-B4AB-B2BEF1E3915B@exonetric.com> References: <CANx%2B6QKT00ZC4Gh3UHp7qW6mtKJHLn_NkMD1gegTYgiu=gByXg@mail.gmail.com> <5644E9F0.40805@freebsd.org> <5FA6299E-962D-4F4B-B4AB-B2BEF1E3915B@exonetric.com>
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> On 13 Nov 2015, at 08:08, Mark Blackman <mark@exonetric.com> wrote: > >> On 12 Nov 2015, at 19:35, Alfred Perlstein <alfred@freebsd.org> wrote: >> >> I'm adding Freebsd-virtualization to this thread as both problems point to some possible issue with FreeBSD as a guest. (although a bare metal comparison should likely be done as well). >> >> -Alfred >> >>> On 11/12/15 11:26 AM, Vladimir Bogrecov wrote: >>> Hello, >>> >>> I'm developing a little project on Python 3.5. The server's operating >>> system is FreeBSD 10.2. Today I decided to do a little test "just for fun" >>> and the result has confused me. I ran the following code >>> >>> import random >>> import time >>> >>> >>> def test_sort(size): >>> sequence = [i for i in range(0, size)] >>> random.shuffle(sequence) >>> start = time.time() >>> ordered_sequence = sorted(sequence) >>> print(time.time() - start) >>> >>> >>> if __name__ == '__main__': >>> test_sort(1000000) >>> >>> on FreeBSD 10.2 x64 and on Debian 8 x64. Both computers was the smallest >>> (5$ per month) virtual machines on the Digital Ocean ( >>> https://www.digitalocean.com). The average result on the FreeBSD was 1.5 >>> sec, on the Debian 1.0 sec. Both machines was created specially for test >>> and had not any customization. Could you help me to understand why python >>> is so slower on FreeBSD and may be there are some steps I can perform to >>> speed up the python to work not slower than on Debian. >>> >>> I have found in Google the similar question: >>> https://lists.freebsd.org/pipermail/freebsd-python/2012-June/004306.html so >>> it has an interest not only for me. >>> >>> P.S. I really like FreeBSD and I would be happy to solve this issue. If you >>> will have an interest to this issue I can provide SSH access for both >>> machines :) >>> >>> Thank You! > > I have some memory that the gettimeofday is quite expensive on FreeBSD as a result of substantially more accuracy and I reckon that test script is calling it about 2 million times. Doh, never mind, misread the python. Just twice. :)
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