bug#39595: closed (M-x compile still very line-length weak)

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Your message dated Mon, 17 Feb 2020 12:07:37 +0100
with message-id <address@hidden>
and subject line Re: #39595: M-x compile still very line-length weak
has caused the debbugs.gnu.org bug report #39595,
regarding M-x compile still very line-length weak
to be marked as done.

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39595: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=39595
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> Subject: 
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> M-x compile still very line-length weak
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> Date: 
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> Thu, 13 Feb 2020 13:51:57 +0800
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> Compare M-x compile on make aaa vs. make bbb
> $ cat Makefile
> aaa:; perl -we 'print " "  x 9999;' #finishes right away.
> bbb:; perl -we 'print "\n" x 9999;' #takes several seconds, even on the latest 
> hardware.
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> (Indeed, on even longer lines we even see both the words "exit" and "Compiling" 
> at the same time in the modeline.)
> emacs-version "26.3"
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> --- Begin Message ---
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> Subject: 
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> Re: #39595: M-x compile still very line-length weak
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> Date: 
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> Mon, 17 Feb 2020 12:07:37 +0100
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> 16 feb. 2020 kl. 16.37 skrev 積丹尼 Dan Jacobson <address@hidden>:
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> > I bet it does!
> > (All I know is I just use Debian sid. So in two years...)
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> Very well, pushed to emacs-27.
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> For future work, there seem to be more opportunities for speeding up the 
> remaining regexps. In particular:
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> * Try to anchor matches at bol when possible.
> * Avoid infinite repetitions (of spaces, etc) when the exact amount is known.
> * Reject impossible matches as early as possible.
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