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Re: 40% performance regression SPEC2006/leslie3d on gcc-4_2-branch
Richard Guenther wrote:
>> This is 4.7% drop of SPECfp_base2006 ratio (geomean of individual FP
>> ratios).
Clearly, 4.7% is significant. Grigory, thanks for the measurements!
>> Here is the full set of changes in cpu2k6/fp performance of GCC 4.2
>> compiler between r116799 and r120817, measured on Intel Core2 Duo at -O2
>> optimization level.
>
> Do you happen to have a 4.1.x baseline to compare those against?
Excellent question; I should have asked for that as well. If 4.2 has
gained on 4.1 in other respects, the 4.7% drop might represent a smaller
regression relative to 4.1.
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Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713