2010/11/30 Václav Šmilauer <[email protected]> > > GCC needs additional option for compiling -fprofile-generate >> http://stackoverflow.com/questions/1851299/is-it-possible-to-tell-the-branch-predictor-how-likely-it-is-to-follow-the-branch >> And then those examples are working. >> > Oh, you can sun scons with arcs=gen or arcs=use, that will turn on branch > profile generation/usage. When I tried it, it made no difference (long time > ago), does it mean we need to use additional arguments to gcc to make it > really work? Thanks for the link, I will read it in train, it looks > interesting. > > We can try and measure productivity with additional parameter. If it really helps, why not. Bit I think, first of all, we should add more of those "likely/unlikely" expressions to get the difference.
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