Package: grep Tags: patch I have overlooked the important thing about optimization by trivial_case_ignore. After optimization by trivial_case_ignore, kwset engine can be used yet. However, if remove trivial_case_ignore, it's never used longer because kwsmusts does nothing when MB_CUR_MAX > 1 && match_icase.
The patch reverts removal of trivial_case_ignore and fixes 200x slower for non-UTF8 locales with another approach. It always prefers CSET to replacement to OR and no longer use CSET for non-UTF8 locales in DFA engine. It can also optimize by trivial_case_ignore and enables to speed-up >20x for non-UTF8 locales. (I tested it with euc-jp) Norihiro
patch.txt
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tests.txt
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