On 2/24/07, Serge Belyshev <[EMAIL PROTECTED]> wrote:
I have compared 4.1.2 release (r121943) with three revisions of 4.2 on spec2k
on an 2GHz AMD Athlon64 box (in 64bit mode), detailed results are below.
In short, current 4.2 performs just as good as 4.1 on this target
with the exception of huge 80% win on 178.galgel. All other difference
lies almost in the noise.
results:
first number in each column is a runtime difference in %
between corresponding 4.2 revision and 4.1.2 (+ is better, - is worse).
second number is a +- confidence interval, i.e. according to my results,
current 4.2 does (82.0+-1.7)% better than 4.1.2 on 178.galgel.
(note some results are clearly noisy, but I've tried hard to avoid this --
I did three runs on a completely idle machine, wasting 14 hours of machine time
in total).
r117890 -- 4.2 just before DannyB's aliasing fixes
r117891 -- 4.2 with aliasing fixes.
r122236 -- 4.2 current.
Uh, these are the wrong revisions.
117890 is correct, but 117891 is superseded by 117922, which will make
things worse than 117891 will.
This is why the current numbers are worse than the second column, my guess.
In particular, 117922 is goin
