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Re: Timing execution of function calls in Emacs lisp


From: Nordlöw
Subject: Re: Timing execution of function calls in Emacs lisp
Date: Thu, 5 Jun 2008 11:09:35 -0700 (PDT)
User-agent: G2/1.0

On 5 Juni, 18:25, Evans Winner <address@hidden> wrote:
> Nordlöw <address@hidden> writes:
>
>     Is there a way to measure the execution time of function calls?
>
>     Compare with following Matlab-snippet:
>       tic; do_something(with_some_arg); toc
>
> I am curious what the serious Elispers would do, so as bait
> I wrote my own (almost certainly bad) attempt.  I understand
> using `eval is bad form.  Still not too sure why.  Also, do
> you need to do anything with the whatever it is your
> function returns?  And I don't imagine this could be very
> accurate.  Would something like this really have to be
> implemented in C?  Maybe it already is.
>
> (defvar tic nil)
> (defvar toc nil)
>
> (defun tic ()
>   (setq tic (current-time)))
>
> (defun toc ()
>   (setq toc (current-time)))
>
> (defun time (form)
>   (progn
>     (tic)
>     (eval form)
>     (toc)
>     (time-subtract toc tic)))

benchmark-run() does the trick!

Many thanks,
Nordlöw


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