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bug#18522: 24.4.50; mapcar is very slow
From: |
Eli Zaretskii |
Subject: |
bug#18522: 24.4.50; mapcar is very slow |
Date: |
Mon, 22 Feb 2016 22:56:43 +0200 |
> From: Peter Münster <pmlists@free.fr>
> Cc: rudalics@gmx.at, larsi@gnus.org, 18522@debbugs.gnu.org
> Date: Mon, 22 Feb 2016 21:41:11 +0100
>
> On Mon, Feb 22 2016, Eli Zaretskii wrote:
>
> > I think the next step is to profile the code below "let". Can you try
> > using 'perf' for that purpose?
>
> Slow emacs: almost all time is spent in Fset_default (96%)
>
> Fast emacs:
> 25.36% emacs emacs [.] eval_sub
> 10.73% emacs emacs [.] Fset_default
> 9.63% emacs emacs [.] Flength
> 6.54% emacs emacs [.] unbind_to
> 5.44% emacs emacs [.] hash_lookup
> 4.53% emacs emacs [.] Flet
So now the question becomes: which part of Fset_default? I thought it
was the loop over all the buffers, but your session seems to say it
couldn't be. Then what is it?
> You can try it too on your running sessions: "perf record -p PID" and
> then "perf report". (just use something like "dotimes (i 1000000000)")
Alas, there's no 'perf' on MS-Windows (nor anything like it, AFAIK).
- bug#18522: 24.4.50; mapcar is very slow, (continued)
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/21
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/21
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/21
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/21
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/21
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/22
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/22
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/22
- bug#18522: 24.4.50; mapcar is very slow,
Eli Zaretskii <=
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/23
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/23
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/23
- bug#18522: 24.4.50; mapcar is very slow, Andreas Schwab, 2016/02/23
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/24
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/23
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/24
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/24
- bug#18522: 24.4.50; mapcar is very slow, Peter Münster, 2016/02/24
- bug#18522: 24.4.50; mapcar is very slow, Eli Zaretskii, 2016/02/24