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Re: Timing execution of function calls in Emacs lisp


From: Nikolaj Schumacher
Subject: Re: Timing execution of function calls in Emacs lisp
Date: Thu, 05 Jun 2008 20:27:46 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (darwin)

Nordlöw <address@hidden> wrote:

> Is there a way to measure the execution time of function calls?
>
> Compare with following Matlab-snippet:
>   tic; do_something(with_some_arg); toc
>
> In emacs lisp perhaps something like:
>   (time FUNCTION ARGS...)

Here's what I use.  It works well enough for my purposes.

(defmacro measure-time (&rest body)
  "Measure the time it takes to evaluate BODY."
  `(let ((time (current-time)))
     ,@body
     (message "%.06f" (float-time (time-since time)))))

It's used like this:

(measure-time
  (dotimes (i 100000)
    (1+ 1)))

regards,
Nikolaj Schumacher




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