[issue11051] system calls per import

[Charles-François Natali]

Charles-François Natali <neologix at free.fr> added the comment:

Here's a trivial patch reducing the number of calls to open.
before:
"""
$ strace -c -e open ./python -c ""
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
100.00    0.000049           0       392       306 open
------ ----------- ----------- --------- --------- ----------------
100.00    0.000049                   392       306 total
"""
after:
"""
$ strace -c -e open ./python -c ""
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
100.00    0.000024           0        86           open
------ ----------- ----------- --------- --------- ----------------
100.00    0.000024                    86           total
"""

As for the flury of tentative locations, I don't feel like modifying this since I'm not familiar enough with the import machinery.

----------
keywords: +patch
nosy: +neologix
Added file: http://bugs.python.org/file23858/import_stat.diff

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