js a écrit : > Just my curiosity. > Can python beats perl at speed of grep-like processing?
Probably not. > > $ wget http://www.gutenberg.org/files/7999/7999-h.zip > $ unzip 7999-h.zip > $ cd 7999-h > $ cat *.htm > bigfile > $ du -h bigfile > du -h bigfile > 8.2M bigfile > > ---------- grep.pl ---------- > #!/usr/local/bin/perl > open(F, 'bigfile') or die; > > while(<F>) { > s/[\n\r]+$//; > print "$_\n" if m/destroy/oi; > } > ---------- END ---------- > ---------- grep.py ---------- > #!/usr/bin/env python > import re > r = re.compile(r'destroy', re.IGNORECASE) > > for s in file('bigfile'): > if r.search(s): print s.rstrip("\r\n") > ---------- END ---------- Please notice that you're also benchmarking IO here - and perl seems to use a custom, highly optimized IO lib, that is much much faster than the system's one. I once made a Q&D cat-like comparison of perl, Python and C on my gentoo-linux box, and the perl version was insanely faster than the C one. Now the real question is IMHO: is the Python version fast enough ? My 2 cents.. -- http://mail.python.org/mailman/listinfo/python-list
