bug#13461: Subject: 24.2; highlight lines regexp does not highlight all lines

[Glenn Morris]

Dave Franklin wrote:

> I position the cursor on the first line in the file.
> When I execute the command: M-x highlight-lines-matching-regexp and
> select a regexp to use, Emacs only highlights a small fraction of lines
> that that match such regexp.

Maybe you want to increase hi-lock-highlight-range /
hi-lock-file-patterns-range. There may be performance consequences
though.