Minimizing 6.8.1 (not KDrive) to meet specs

Alan Cox alan at
Thu Sep 23 14:14:49 PDT 2004

On Iau, 2004-09-23 at 17:57, Francois Tigeot wrote:
> -O3 and such doesn't imply better performance in all cases. You should do
> some benchmarking to be sure.

-O3 is generally the slowest option of all because it aggressively
unrolls loops. Short of specialist FP cases for Xeons its probably not

> I was surprised to find -Os faster than -O2 during some tests, but then it
> was on a VIA C3, which is notorious for not having much cache...

If you build the entire gnome desktop its faster -Os on many machines,
as is open office. Cache is king.

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