Antoine Pitrou <pit...@free.fr> added the comment: Without Christian's patch:
[400KB.txt] read one byte/char at a time... 0.2685 MB/s (100% CPU) [400KB.txt] read 20 bytes/chars at a time... 4.536 MB/s (98% CPU) [400KB.txt] read one line at a time... 3.805 MB/s (99% CPU) [400KB.txt] read 4096 bytes/chars at a time... 29.23 MB/s (100% CPU) [ 20KB.txt] read whole contents at once... 52.42 MB/s (99% CPU) [400KB.txt] read whole contents at once... 45.83 MB/s (100% CPU) [ 10MB.txt] read whole contents at once... 48.78 MB/s (99% CPU) With the patch: [400KB.txt] read one byte/char at a time... 0.2761 MB/s (100% CPU) [400KB.txt] read 20 bytes/chars at a time... 4.656 MB/s (99% CPU) [400KB.txt] read one line at a time... 3.956 MB/s (98% CPU) [400KB.txt] read 4096 bytes/chars at a time... 33.85 MB/s (100% CPU) [ 20KB.txt] read whole contents at once... 66.17 MB/s (99% CPU) [400KB.txt] read whole contents at once... 56.65 MB/s (99% CPU) [ 10MB.txt] read whole contents at once... 63.69 MB/s (99% CPU) Python 2.6's builtin file object: [400KB.txt] read one byte/char at a time... 1.347 MB/s (97% CPU) [400KB.txt] read 20 bytes/chars at a time... 26.65 MB/s (99% CPU) [400KB.txt] read one line at a time... 184.4 MB/s (100% CPU) [400KB.txt] read 4096 bytes/chars at a time... 1163 MB/s (99% CPU) [ 20KB.txt] read whole contents at once... 1072 MB/s (100% CPU) [400KB.txt] read whole contents at once... 889.1 MB/s (100% CPU) [ 10MB.txt] read whole contents at once... 600 MB/s (100% CPU) _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue4561> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
