New submission from Armin Rigo <[email protected]>:
Removing multimethods had a big performance hit on the no-jit case, sometimes.
I suspect it can be fixed relatively easily. We *should* probably fix it.
Revision 93322cb79586 (hg merge remove-list-smm-2) makes nbody_modified much
slower; we can see that it makes this kind of code almost twice as slow:
lst = [1.2, 3.4]
for i in range(BIG):
lst[1] = lst[1] + n
Revision d1459869ce85 (Merge remove-array-smm branch that kills multimethods
from the array module) makes crypto_pyaes.py much slower; not surprizingly, it
uses array.
"Much slower" is almost a factor two in both cases.
----------
messages: 5801
nosy: arigo, pypy-issue
priority: performance bug
status: unread
title: Removing multimethods slows the nojit case
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