Isaac Gouy

Recent Actions

• Commented on Optimizing compiler benchmarks (part 1)
  from "The Computer Language Benchmarks Game" at Thank you. (part 2) "the shootout precision tests" The phrase - the benchmarks game precision tests - seems to work....
• Commented on Optimizing compiler benchmarks (part 1)
  Nice article, but please stop saying "alioth shootout" -- the project was renamed over 5 years ago....
• Commented on The alioth shootout Computer Language Benchmarks Game
  > I used github not alioth for a pull request Why? github is an out-of-date snapshot....
• Commented on The alioth shootout Computer Language Benchmarks Game
  @Reini Urban - The fastest is usually multi without ithreads Here are measurements for i686-linux-multi http://shootout.alioth.debian.org/u32/measurements.php?lang=perl What's makes you think they would be faster than measurements for i686-linux? (I think they're slower.)...
• Commented on The alioth shootout Computer Language Benchmarks Game
  @Reini Urban - some distros also have The website says which distro is used - Ubuntu. The distro Perl is $ /usr/bin/perl -V Summary of my perl5 (revision 5 version 10 subversion 1) configuration: Platform: osname=linux, osvers=2.6.24-27-server, archname=i686-linux-gnu-thread-multi...
• Commented on The alioth shootout Computer Language Benchmarks Game
  @Reini Urban - The tracker contains... I know, and I know the program it's based on a program that probably changed the algorithm to remove most of the work, and I'll have to work through it line-by-line :( Apart from...
• Commented on The alioth shootout Computer Language Benchmarks Game
  @zgrim - You still haven't told us which Perl regex-dna program you're talking about. Is it one of the 4 Perl regex-dna programs currently shown? Which program? @zgrim - As you so bluntly expect me to have made a mistake...
• Commented on The alioth shootout Computer Language Benchmarks Game
  @zgrim - on my machine and observed that perl was almost twice as fast as python Maybe you made a mistake :-) Or maybe you didn't measure the same programs, the same workloads, the same versions, the same OS, the...
• Commented on The alioth shootout Computer Language Benchmarks Game
  > I started improving some of the slowest scripts... Here are step by step instructions for contributing your better scripts - http://shootout.alioth.debian.org/help.php#contribute...

Comment Threads

• Reini Urban commented on The alioth shootout Computer Language Benchmarks Game

  Sure. Changed back the indentation.

  I also over micro-optimized a bit. No stringifiy in print only saves some microseconds outside the loop.

  I'm more worried that all my compiled versions are slower than the pure perl versions.
  Esp. the perlcc -O typed versions. Not ready yet for primetime

• Reini Urban commented on The alioth shootout Computer Language Benchmarks Game

  You are right.
  I started too ambitious :)

• Reini Urban commented on The alioth shootout Computer Language Benchmarks Game

  @Isaac Gouy:
  The tracker contains a much better fasta5.pl by Rodrigo de Oliveira, which uses a faster algorithm.

  Some more micro-optimization:
  multi + thread is usually not used on linux/bsd.
  If something like threads are wanted, than usually Coro.
  Is this default at debian?
  The fastest is usually multi without ithreads, some distros also have just no ithreads without multi.
  Only windows uses ithreads to emulate fork.

• Reini Urban commented on The alioth shootout Computer Language Benchmarks Game

  You are right.

  I compared
  http://shootout.alioth.debian.org/u32q/measurements.php?lang=perl
  vs.
  http://shootout.alioth.debian.org/u32/measurements.php?lang=perl

  multi non-multi CPU-secs (lower number is faster)
  binary-trees 761.37 662.98
  fannkuch-redux 3,210.13 2,756.98
  fasta 2.38 …

• Reini Urban commented on The alioth shootout Computer Language Benchmarks Game

  I used github not alioth for a pull request, improved binarytree:

  https://github.com/kragen/shootout/pull/1