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Re: is there a emacs lisp timing command?


From: thierry . volpiatto
Subject: Re: is there a emacs lisp timing command?
Date: Tue, 24 Mar 2009 07:12:41 +0100
User-agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.0.91 (gnu/linux)

Hi, 
have a look at traverselisp.el,
the function `traverse-deep-rfind' have a timer.
http://www.emacswiki.org/cgi-bin/emacs/traverselisp.el

Xah Lee <address@hidden> writes:

> is there a elisp command like timing, that returns the time a function
> took?
>
> while testing some performance issues, i tried to write one.
>
> (defun xx-timing ()
>   "returns the timing."
>   (interactive)
>   (let (starttime endtime)
>     (setq starttime (current-time))
>
>     ;; some function here
>     (sleep-for 0 5)
>
>     (setq endtime (current-time))
>     (message "%f" (+ (* (- (elt endtime 0)
>                            (elt starttime 0)) 65536)
>                      (- (elt endtime 1)
>                         (elt starttime 1))
>                      (* (- (elt endtime 2)
>                            (elt starttime 2)) 0.001)))
>     ))
>
> but after about 20 minutes on this, i gave up. It seems to me, when
> microseconds is involved (returned by current-time), the result is
> weired. I don't see any logical problem in my code, but the above code
> is obvious wrong, often returning results some 70 seconds extra
> whenever microseconds is involved.
>
> anyone has written a timing command somewhere?
>
> This is on:
> GNU Emacs 22.2.1 (powerpc-apple-darwin8.11.0, Carbon Version 1.6.0) of
> 2008-04-05 on g5.tokyo.stp.isas.jaxa.jp
>
> PowerPC G5, osx 10.4.11.
>
>   Xah
>http://xahlee.org/
>
>
>
>

-- 
A + Thierry Volpiatto
Location: Saint-Cyr-Sur-Mer - France





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