Yes, here are the results from the unpatched compiler: Avg. wall time (s): 0.73241 Std. deviation: 0.05850
And here are the results from the patched compiler: Avg. wall time (s): 0.75554 Std. deviation: 0.07492 The testing methodology was the same (100 trials), except I used `clang -x objective-c -Xclang -emit-pch`. There is a slight difference, but it still basically looks noisy to me. vedant > On May 19, 2016, at 2:48 PM, Argyrios Kyrtzidis <akyr...@gmail.com> wrote: > > Could you also check performance of creating a PCH file out of Cocoa.h ? > >> On May 19, 2016, at 1:47 PM, Vedant Kumar <v...@apple.com> wrote: >> >> vsk added a comment. >> >> I discussed this bug with Argyrios off-list, who lgtm'd on the condition >> that it doesn't introduce a performance regression. He suggested >> preprocessing Cocoa.h to stress the patch. After running a stabilization >> script, I used this command to stress RelNoAsserts builds of clang both with >> and without this patch. >> >> for I in $(seq 1 100); do time $CC -F >> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks >> -E Cocoa.h -o /dev/null; done >> >> The results are basically in the noise (link to raw data: >> https://ghostbin.com/paste/r6cyh): >> >> | Compiler | **Unpatched** TOT | **Patched** TOT | >> | Avg. wall time (s) | 0.21709 | 0.21608 | >> | Std. deviation | 0.02101 | 0.02219 | >> >> I also made sure that the preprocessed sources emitted by the two compilers >> are the same. >> >> >> http://reviews.llvm.org/D20401 >> >> >> > _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
