[pypy-dev] [pypy-svn] r30034 - pypy/dist/pypy/objspace/std
Alexander Schremmer
2006a at usenet.alexanderweb.de
Fri Jul 14 18:09:13 CEST 2006
Hi Ben Young,
On Fri, 14 Jul 2006 12:12:59 +0100, Ben.Young at risk.sungard.com wrote:
> This looks really good! It shows there are still some major (easy)
> performance wins in PyPy.
Yes, I measured 35% speedup on richards/pystone on "the other branch" (that
solely knows this kind of dictionary unlike the current trunk).
> One question, why would you need any calls to str2object in any of the
> non-mutating methods?
Because every class can define it's own hash/eq functions that might be
considered insane in case of having them return hashes that match the
hashes of a string. That would mean that {"foo": 1}[myClass()] could return
1. Therefore we have to switch the mode while having a shortcut for types
which are known to have sane hashes only.
> w_lookup.__hash__()
I didn't even consider that people would write __hash__ methods with
side-effects :)
Kind regards,
Alexander
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