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Re: Which platforms do/do not support cpu time profiling?
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From: |
Paul Eggert |
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Subject: |
Re: Which platforms do/do not support cpu time profiling? |
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Date: |
Tue, 20 Nov 2012 09:23:00 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121029 Thunderbird/16.0.2 |
On 11/20/12 09:00, Glenn Morris wrote:
> Why would I want to configure with --enable-profiling, and if I do, how
> do I use it?
You'd do that if you want a low-level CPU profile, one that
maps instruction counts to C functions (or even to
machine instructions). You run Emacs and it automatically
generates a file gmon.out when it exits. You then run
the shell command 'gprof emacs gmon.out' to get a textual summary of the
CPU profile.
It's helpful sometimes, when debugging, to get a profile
at this low level rather than at the Lisp level, which
is what the Emacs profiler does.