[cfe-dev] Clang versus GCC speed

[Jean-Daniel Dupas]

Le 20 nov. 2009 à 19:36, David Chisnall a écrit :

> Hi,
> 
> Has anyone done any tests comparing gcc compilation speed to clang  
> recently?  I just did some tests with Objective-C programs and found  
> clang much slower than GCC 4.2, with an optimized build of LLVM and  
> Clang and a stock build of GCC.
> 
> David
> 


Just a quick test gave me this on an Objective-C project:

Clang (r89342) (Note that I replaced Xcode's clang binaries by a svn version so it uses it when I pass com.apple.compilers.llvm.clang.1_0)
time xcodebuild -configuration Release GCC_VERSION=com.apple.compilers.llvm.clang.1_0 ARCHS=i386
	68.314u 16.219s 1:07.79 124.6%	0+0k 17+476io 0pf+0w

GCC-4.2:
time xcodebuild -configuration Release ARCHS=i386
	127.909u 45.820s 2:02.94 141.3%	0+0k 0+639io 0pf+0w


-- Jean-Daniel