If you could please clarify for me, your saying compiling with -falign-functions=32 
gives you gains?

> On all the machines (athlon t-bird, p4) I have tried so far, -O3 always
> decreases performance - O2 is best (dramatically so on something like a
> celery).  Most of the other options you see mentioned on the list show a
> small incremental advantage, except for -falign-functions=4 which also
> slows things down.  Making this 32 gives a small advantage though.

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