GNU bug report logs - #44983
Truncate long lines of grep output

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Juri Linkov <juri <at> linkov.net>
Cc: 44983 <at> debbugs.gnu.org
Subject: bug#44983: Truncate long lines of grep output
Date: Thu, 10 Dec 2020 22:48:10 +0200

On 10.12.2020 10:18, Juri Linkov wrote:
>>> BTW, for sorting currently xref-search-program-alist uses:
>>>       "| sort -t: -k1,1 -k2n,2"
>>> but fortunately ripgrep has a special option to do the same with:
>>>       "--sort path"
>> Somehow, that option came out to be consistently slower in my
>> benchmarking. Even when the results are only a few lines (that's actually
>> when the difference should be most apparent, because with many lines Elisp
>> takes up the most of CPU time). You can try it yourself:
>>
>> (benchmark 10 '(project-find-regexp ":package-version '(xref"))
>>
>>    0.86 with '| sort'
>>    1.33 with '--sort path'
> I confirm that in my tests '--sort path' is 2 times slower than '| sort'.

And that's because '--sort path' forces single-threaded mode: 
https://github.com/BurntSushi/ripgrep/issues/152

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