Regression: Caching of compiler defines/include

[Milian Wolff]

Hey Sergey,

your recent patch broke the caching of the GCCLikeCompiler includes and 
defines, leading to excessive calls execve and string parsing etc. pp. 
CompilerProvider uses configForItem which re-reads the settings and recreates 
Compiler instances all the time, which is a huge waste of resources.

Did you not notice this extreme performance regression?

Could you have a look at that now? I'm in the middle of something else 
(KTextEditor plugin integration) and will revert your patch locally for now. 
Later today I'll then hopefully have time to fixup this issue, but I'd 
appreciate if you could work on that ASAP. Please do test your changes more 
thoroughly - this should have been very obvious when you try to parse any 
project.

Thanks
-- 
Milian Wolff
mail at milianw.de
http://milianw.de
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