On 1/12/06, Bill Schottstaedt <[EMAIL PROTECTED]> wrote: > I ran some timing tests, partly to check out -fast-math -- my informal > impression > is that it speeds up exp by a factor of about 2, but can slow down other > things > (FIR filters). I didn't see any obvious improvement in -O3 over -O2. The > actual numbers are in the snd tarball, snd-edits.c -- look for "fast-math". > (The table is aimed more at comparing int/float/double operations). These > timing numbers change by a factor of, say, 20% on each run, so don't put > much weight on them. > >
I read somewhere that -Os (optimize for "smaller" code, intended for embedded systems maybe?) sometimes produces faster code than -O2 or -O3. Has anybody tried that on their plugins or anything else? Might not help at all if, as Steve Harris said, most plugin inner loops fit in cache already.
