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Date: Wed, 01 Jul 2009 20:32:13 +0300
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: Emacs 23.0.95 pretest is available
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> Date: Tue, 30 Jun 2009 23:21:31 -0400
> From: DJ Delorie <dj AT delorie DOT com>
> 
> 
> > Code that's too optimized is a pain to debug.  I'm unwilling to
> > trade the ability to debug reasonably optimized code for another
> > 6.5% of speedup.
> 
> One of the current projects is to improve the ability to debug
> optimized code.

Yes, I know.  I'm waiting impatiently to see such features in a future
version of GCC.

I miss the days of GCC 2.7.x and 2.8.x, when I could debug a -O2
optimized program with almost the same ease as a non-optimized one.
Being able to do that was once one of the most attractive features of
GCC among the other C compilers.  Now I always compile Emacs with -O1
because otherwise you cannot even get a correct backtrace or put a
breakpoint on a static function and know that it will be hit if the
function is called.