[viff-devel] PRSS zero- and double-sharings

[Martin Geisler]

Mikkel Krøigård <mk at daimi.au.dk> writes:

>> It only used 0.5 seconds of its own time -- the 21 seconds are the
>> total time spend in the child-calls made by inc_pc_wrapper. Since
>> it wraps all important functions its clear that the cumulative time
>> will be big:
>>
>>        ncalls  tottime  percall  cumtime  percall
>>    48003/6003    0.518    0.000   21.195    0.004
>>
>> But any optimization would be good -- if we can same a tiny bit for
>> each of the 48000 calls it might sum up :-)
>
> My observation was just that wrapping is somewhat expensive. I do
> not quite know what to do about this. We have already discussed the
> alternatives to using this method, and they were not particularly
> promising.

Function calls are unfortunately quite expensive in Python. One idea
is to use Psyco (http://tracker.viff.dk/issue51) since it supposedly
should be able to write optimized code on the fly, maybe even do
inlining -- I'm not sure.

-- 
Martin Geisler