bug#22884: 25.0.92; C/l mode editing takes waaaayy too long

Paul Eggert <[email protected]> writes:

> Yes, the workaround already installed in the emacs-25 branch (namely,
> mutate the sources so they don't run afoul of the problem) is good
> enough to solve the immediate problem, so I changed the status of
> Bug#22884 so that it is no longer a blocker for emacs-25.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

Skimming this bug report, it's not quite clear to me what the remaining
problems were.  I can confirm that the test case (going to config.h when
there's "(something in a parenthesis in a comment earlier)" and editing)
is still fast on the trunk, so is there anything more to do in this bug
report?

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