On Sun, Feb 28, 2010 at 16:31, Greg Ewing <greg.ew...@canterbury.ac.nz>wrote:
> Robert Collins wrote: > >> In the special >> case of probing for $name.$ext1, ...$ext2, ...$ext3, you generally hit >> the same pages and don't incur additional page in costs. >> > > So then looking for a .pyc alongside a .py or vice versa > should be almost free, and we shouldn't be worrying about > it. > But that is making the assumption that all filesystems operate this way (.e.g does NFS have the same performance characteristics?). > > hot cache: >> % time seconds usecs/call calls errors syscall >> ------ ----------- ----------- --------- --------- ---------------- >> 45.10 0.000368 92 4 getdents >> 0.00 0.000000 0 734 625 stat >> > > Further supporting the idea that stat calls are negligible > once the cache is warmed up. But that's the point: once it's warmed up. This is not the case when executing a script once every once in a while compared to something bzr where you are most likely going to execute the command multiple times within a small timeframe. -Brett > > > -- > Greg > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/brett%40python.org >
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