bug#15808: 24.3; thing-at-point slow for url and email

[Andreas Röhler]

Am 05.11.2013 03:52, schrieb Leo Liu:
> GNU Emacs 24.3.1 (i386-apple-darwin13.0.0, Carbon Version 1.6.0 AppKit
> 1265) of 2013-10-27 on localhost
>
> While using M-w in simple.el using easy-kill I noticed some delays which
> are due to slow (thing-at-point 'url) and (thing-at-point 'email).
>
> If I narrow the buffer, they become instant. However slowness doesn't
> appear to be proportional to buffer-size, I tried the org.el file and
> they were instant there.
>
> For example
>
> 1. goto function next-error-buffer-p in simple.el
> 2. eval (benchmark-run 10 (thing-at-point 'email))
> 3. eval (benchmark-run 10 (thing-at-point 'url))
>
> email: (4.415538 0 0.0)
> url: (6.74361 0 0.0)
>
> What is choking the regexp engine?
>
> Leo

WRT the url-matter:

There is no need to delegate proceeding upon a separate function dealing with 
URL, as the basic scheme already accepts a function.
Just put the appropriate one there.

Also thing-at-point--bounds-of-well-formed-url seems doing a kind of 
double-check, which seems good as analyze-tool when bug-reporting, but nothing 
to fire up all the time.

Etc.

HTH,

Andreas