Daniel Stutzbach <daniel <at> stutzbachenterprises.com> writes:
>
> Would it be much trouble to also compare performance with Python 2.6?
Here are the results on trunk. Keep in mind Text IO, while it's still `open("r",
filename)`, does not mean the same thing.
=== 2.7 I/O (trunk) ===
** Binary input **
[ 400KB ] read one unit at a time... 1.48 MB/s
[ 400KB ] read 20 units at a time... 29.2 MB/s
[ 400KB ] read 4096 units at a time... 1038 MB/s
[ 20KB ] read whole contents at once... 1145 MB/s
[ 400KB ] read whole contents at once... 891 MB/s
[ 10MB ] read whole contents at once... 966 MB/s
[ 400KB ] seek forward one unit at a time... 0.893 MB/s
[ 400KB ] seek forward 1000 units at a time... 568 MB/s
[ 400KB ] alternate read & seek one unit... 1.11 MB/s
[ 400KB ] alternate read & seek 1000 units... 563 MB/s
** Text input **
[ 400KB ] read one unit at a time... 1.41 MB/s
[ 400KB ] read 20 units at a time... 28.4 MB/s
[ 400KB ] read one line at a time... 207 MB/s
[ 400KB ] read 4096 units at a time... 1060 MB/s
[ 20KB ] read whole contents at once... 1196 MB/s
[ 400KB ] read whole contents at once... 841 MB/s
[ 10MB ] read whole contents at once... 966 MB/s
[ 400KB ] seek forward one unit at a time... 0.873 MB/s
[ 400KB ] seek forward 1000 units at a time... 589 MB/s
** Binary append **
[ 20KB ] write one unit at a time... 0.887 MB/s
[ 400KB ] write 20 units at a time... 15.8 MB/s
[ 400KB ] write 4096 units at a time... 1071 MB/s
[ 10MB ] write 1e6 units at a time... 1523 MB/s
** Text append **
[ 20KB ] write one unit at a time... 1.33 MB/s
[ 400KB ] write 20 units at a time... 22.9 MB/s
[ 400KB ] write 4096 units at a time... 1244 MB/s
[ 10MB ] write 1e6 units at a time... 1540 MB/s
** Binary overwrite **
[ 20KB ] modify one unit at a time... 0.867 MB/s
[ 400KB ] modify 20 units at a time... 15.3 MB/s
[ 400KB ] modify 4096 units at a time... 446 MB/s
[ 400KB ] alternate write & seek one unit... 0.237 MB/s
[ 400KB ] alternate write & seek 1000 units... 151 MB/s
[ 400KB ] alternate read & write one unit... 0.221 MB/s
[ 400KB ] alternate read & write 1000 units... 153 MB/s
** Text overwrite **
[ 20KB ] modify one unit at a time... 1.32 MB/s
[ 400KB ] modify 20 units at a time... 22.5 MB/s
[ 400KB ] modify 4096 units at a time... 509 MB/s
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