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mirror of https://github.com/mawww/kakoune.git synced 2024-11-29 10:02:57 +03:00
kakoune/rc/detection
Johannes Altmanninger b7e9d9bae3 rc detection modeline: optimize modeline pre-filtering
modeline-parse leads by matching an expensive regex against the entire buffer,
which can take a long time on huge files.

Perl takes too long on this regex and it seems not even ripgrep
optimizes the \z component

	$ ruby -e '10000.times { puts "a" * 10000 }' > big
	$ time rg --multiline --only-matching '\A(.+\n){1,5}|(.+\n){1,5}\z' big | wc -l
	10
	__________________________
	Executed in  419.81 millis
	   usr time  399.84 millis
	   sys time   20.78 millis

where

	$ time kak big -e q
	__________________________
	Executed in  179.19 millis
	   usr time  133.61 millis
	   sys time   53.50 millis

Let's lose the regex.

Fixes #4911
2023-06-02 22:38:32 +02:00
..
editorconfig.kak rc detection editorconfig: use file completions for editorconfig-load 2022-10-16 09:57:46 +02:00
file.kak rc file-detection hook group 2022-04-20 23:11:10 -03:00
modeline.kak rc detection modeline: optimize modeline pre-filtering 2023-06-02 22:38:32 +02:00