From: "zzak (Zachary Scott)" Date: 2013-05-17T21:42:30+09:00 Subject: [ruby-core:55026] [ruby-trunk - Feature #6183] Enumerator::Lazy performance issue Issue #6183 has been updated by zzak (Zachary Scott). @gregolsen Thank you! I will try to review this soon, before you have to rebase again ;) Mind if I delete the old patches? It might confuse someone looking at the ticket. ---------------------------------------- Feature #6183: Enumerator::Lazy performance issue https://bugs.ruby-lang.org/issues/6183#change-39372 Author: gregolsen (Innokenty Mikhailov) Status: Assigned Priority: Low Assignee: zzak (Zachary Scott) Category: Target version: I benchmarked Enumerator::Lazy and that's what I got: user system total real Lazy: 0.690000 0.010000 0.700000 ( 0.733160) Normal: 0.160000 0.010000 0.170000 ( 0.186695) It seems like even with 4 chain links and 3000 elements in initial array, Lazy enumerator is almost 4(!) times slower than the normal case. Instead of performance benefit we've got 4 times performance drawback. See test file attached. -- http://bugs.ruby-lang.org/