From: ko1@... Date: 2017-01-31T09:36:02+00:00 Subject: [ruby-core:79358] [Ruby trunk Bug#8012][Closed] Performance degradation in 2.0.0p0 Issue #8012 has been updated by Koichi Sasada. Status changed from Assigned to Closed Please reopen it if you find this issue remaining. ---------------------------------------- Bug #8012: Performance degradation in 2.0.0p0 https://bugs.ruby-lang.org/issues/8012#change-62783 * Author: Munagala Ramanath * Status: Closed * Priority: Normal * Assignee: Koichi Sasada * Target version: 2.2.0 * ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux] * Backport: ---------------------------------------- $ ruby -v ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux] I'm running a simple CPU intensive benchmark: puts (0..11).to_a.permutation.inject(0) { |m, _| m += 1 } This takes around 158s with 1.9.3 and 200s with 2.0.0p0 which seems like a substantial degradation. Running with -rprofile shows a large number of calls to "nil#" in 2.0.0p0 which are absent in 1.9.3 Please see the thread in http://www.ruby-forum.com/topic/4411570#new for more details. -- https://bugs.ruby-lang.org/ Unsubscribe: