From: marcandre-ruby-core@... Date: 2020-07-14T03:37:06+00:00 Subject: [ruby-core:99163] [Ruby master Bug#17030] Enumerable#grep{_v} should be optimized for Regexp Issue #17030 has been updated by marcandre (Marc-Andre Lafortune). You are right for `grep` with a block, we can't necessarily optimize, but we should optimize `grep` without a block, no? ---------------------------------------- Bug #17030: Enumerable#grep{_v} should be optimized for Regexp https://bugs.ruby-lang.org/issues/17030#change-86541 * 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) } # about 3x faster and 6x more memory efficient than array.grep(REGEXP) ``` This is because `grep` calls `Regexp#===` which creates useless `MatchData` -- https://bugs.ruby-lang.org/ Unsubscribe: