Re: Speed of all-completions

[Lawrence Mitchell]

Stefan Monnier wrote:
> Barely 6 years ago, Jesper Harder <address@hidden> wrote:

[...]

> I cannot reproduce it now.  I tried it with `emacs21', `emacs22', and
> `emacs23' (under Debian testing, and adding a 0 to the number of
> iterations of your test), and I do see that Emacs is getting slower, the
> difference is not nearly as large, changing from 0.05s to
> 0.06s, basically.

FWIW, I see the same behaviour here 2 times out of 3.  On the
third occasion, Emacs takes about half a second in GC.  With the
following test case:

(defvar foo-ob nil)
(defun foo (n)
  (when (null foo-ob)
    (setq foo-ob (make-vector 255 0))
    (dotimes (i n)
      (intern (format "f%i" i) foo-ob)))
  (time (all-completions "f" foo-ob)))

(byte-compile 'foo)
(setq garbage-collection-messages t)
(setq gc-cons-threshold 400000)
(foo 100000)


With (setq gc-cons-threshold 4000000) all-completions GCs one
time in five.

Cheers,
Lawrence
-- 
address@hidden