[Python-Dev] Re: [Python-checkins] python/dist/src/Python ceval.c,
2.383, 2.384
Armin Rigo
arigo at tunes.org
Sat Mar 20 16:57:48 EST 2004
Hello Raymond,
On Sat, Mar 20, 2004 at 04:14:58PM -0500, Raymond Hettinger wrote:
> > A 2% speed improvement with gcc on low-endian machines. My guess is
> that this new pattern for NEXTARG() is detected and optimized as a single
> (*short) loading.
>
> It is possible to verify that guess by looking at the generated
> assembler.
I was too hasty in checking this in. That guess is actually false.
The speed-up was due (as usual) to random changes in performance when anything
around there changes, and cannot be reliably reproduced. I cancelled that
change altogether.
Armin
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