Date: Sun, 15 Sep 2013 11:26:33 +0200 From: Dominic Fandrey <kamikaze@bsdforen.de> To: freebsd-toolchain@freebsd.org Subject: Profiling with clang Message-ID: <52357D49.5020907@bsdforen.de>
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Recently I've been using profiling with c++ -pg a lot. I'm developing a simulation and have been able to more than double the performance, just by focusing my attention on the top functions listed in the profile. Inlining them, optimising them or finding ways to call them less often. Even though I use clang as my compiler, for profiling I have to refer to the old gcc42. Is there any work on making profiling work with clang? On a side node, clang and gcc47 from ports produce equally fast binaries (there is literally no difference outside of the error margin). For both clang and gcc47 -O3 binaries are not faster than -O2 binaries. They used to be slower, when the code was less polished. -- A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail?
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