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Date: Sun, 15 Sep 2013 11:44:34 +0200
From: Roman Divacky <rdivacky@freebsd.org>
To: Dominic Fandrey <kamikaze@bsdforen.de>
Subject: Re: Profiling with clang
Message-ID: <20130915094434.GA15535@freebsd.org>
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clang -pg should work just fine... what problems are you seeing?

On Sun, Sep 15, 2013 at 11:26:33AM +0200, Dominic Fandrey wrote:
> 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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