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On Saturday 17 May 2003 13:43, Sven Vermeulen wrote: |
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> On Sat, May 17, 2003 at 03:49:11AM +0100, Chris Davies wrote: |
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> > I had the idea to build -fbranch-probabilities optimisation into portage. |
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> > This is where a sample run of data is taken using the program compiled |
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> > with -fprofile-arcs, and that data then used to reorganise the object |
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> > code so conditional branches are layed out in a more efficient manner. |
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> |
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> Why implement it in Portage? Isn't it up to the user to define it in the |
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> CFLAGS or not? |
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This won't be possible because if you want this optimisation you have: |
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a) To compile the program with -fprofile-arcs |
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b) Run the program |
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c) Recompile the program with the same optimisations but with |
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- -fbranch-probabilities |
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|
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- -- |
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Werner,- |
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