From: matz@... Date: 2020-09-25T06:53:54+00:00 Subject: [ruby-core:100127] [Ruby master Bug#17030] Enumerable#grep{_v} should be optimized for Regexp Issue #17030 has been updated by matz (Yukihiro Matsumoto). As far as we measured, there are still plenty of room for the optimization (for example, we don't need to allocate `MatchObject` for `grep_v`). We will investigate to improve the performance for those methods. Besides that, `/f` flag for regexp may be a useful idea (though little ugly). Could you resubmit the independent issue for the feature, if you like. Matz. ---------------------------------------- Bug #17030: Enumerable#grep{_v} should be optimized for Regexp https://bugs.ruby-lang.org/issues/17030#change-87696 * Author: marcandre (Marc-Andre Lafortune) * Status: Open * Priority: Normal * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- Currently, ```ruby array.select { |e| e.match?(REGEXP) } ``` is about three times faster and six times more memory efficient than ```ruby array.grep(REGEXP) ``` This is because `grep` calls `Regexp#===`, which creates useless `MatchData`. -- https://bugs.ruby-lang.org/ Unsubscribe: