Re: Performance asymmetry with overlays

[Satyaki Das]

Luc Teirlinck <address@hidden> writes:

> Apparently your particular test runs a lot faster with overlays
> centered at point-max.  I do not know whether that is really a general
> rule, however.  Somebody who knows more about the internal
> implementation of overlays than I do should comment on that.
> 
> The folllowing variation on your test contains only one single added
> line:
> 
> (overlay-recenter (point-max)) 
> 
> With this change, execution speed seems to be essentially independent
> of the starting position.

Thanks, that performs much better! I needed an overlay-recenter in
the other function too. Otherwise that becomes slow.

Satyaki