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Re: print statements and profiling a function slowed performance

References (1 earlier) <mailman.11266.1403810884.18130.python-list@python.org> <d1dbc61a-ed09-4a10-b4d5-deb40cb54430@googlegroups.com> <53acdd24$0$29985$c3e8da3$5496439d@news.astraweb.com> <lok45f$45v$1@ger.gmane.org> <CANc-5UxS9O=yPphCGzr=cbX-_SLTKLq28FbxwC2FVwLPrbqXqw@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2014-06-27 15:35 -0600
Subject Re: print statements and profiling a function slowed performance
Newsgroups comp.lang.python
Message-ID <mailman.11294.1403904986.18130.python-list@python.org> (permalink)

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On Fri, Jun 27, 2014 at 10:05 AM, Skip Montanaro <skip@pobox.com> wrote:
> On Fri, Jun 27, 2014 at 10:55 AM, Mark Lawrence <breamoreboy@yahoo.co.uk> wrote:
>> Expectations don't count, measure it :)
>
> It's no contest. I have measured it (ages ago). The logging module
> does so many things that it's impossible for it to ever be as fast as
> a simple print statement. Look at the code in LogRecord.__init__. Then
> note the doc string:
>
> ... LogRecord instances are created every time something is logged. ...

While I'm not disputing your measurement, doesn't the logging module
delegate the actual I/O to a separate thread?  That's got to count for
something, compared to a raw print that has to wait for the I/O to
finish.

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print statements and profiling a function slowed performance CM <cmpython@gmail.com> - 2014-06-26 11:44 -0700
  Re: print statements and profiling a function slowed performance Michael Torrie <torriem@gmail.com> - 2014-06-26 13:14 -0600
    Re: print statements and profiling a function slowed performance CM <cmpython@gmail.com> - 2014-06-26 13:36 -0700
      Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-27 12:06 +1000
      Re: print statements and profiling a function slowed performance Michael Torrie <torriem@gmail.com> - 2014-06-26 19:59 -0600
      Re: print statements and profiling a function slowed performance Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-06-28 09:41 -0400
      Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-28 23:50 +1000
      Re: print statements and profiling a function slowed performance Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-06-29 02:14 -0400
      Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-29 17:14 +1000
  Re: print statements and profiling a function slowed performance Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-06-26 20:27 +0100
    Re: print statements and profiling a function slowed performance CM <cmpython@gmail.com> - 2014-06-26 13:37 -0700
      Re: print statements and profiling a function slowed performance Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-27 02:55 +0000
        Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-27 13:14 +1000
        Re: print statements and profiling a function slowed performance Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-06-27 16:55 +0100
        Re: print statements and profiling a function slowed performance Skip Montanaro <skip@pobox.com> - 2014-06-27 11:05 -0500
        Re: print statements and profiling a function slowed performance Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-27 15:35 -0600
        Re: print statements and profiling a function slowed performance Skip Montanaro <skip@pobox.com> - 2014-06-27 19:12 -0500
        Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-28 10:29 +1000
          Re: print statements and profiling a function slowed performance Marko Rauhamaa <marko@pacujo.net> - 2014-06-28 22:20 +0300
            Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-29 09:30 +1000
            Re: print statements and profiling a function slowed performance Rustom Mody <rustompmody@gmail.com> - 2014-06-28 19:25 -0700
              Re: print statements and profiling a function slowed performance Chris Angelico <rosuav@gmail.com> - 2014-06-29 12:32 +1000
        Re: print statements and profiling a function slowed performance Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-06-28 02:06 +0100
  Re: print statements and profiling a function slowed performance Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-06-26 22:11 -0400

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