From: "mame (Yusuke Endoh)" Date: 2022-07-20T08:21:51+00:00 Subject: [ruby-core:109256] [Ruby master Bug#18929] ruby master looks slower than 3.1 on a micro benchmark of short-lived objects Issue #18929 has been reported by mame (Yusuke Endoh). ---------------------------------------- Bug #18929: ruby master looks slower than 3.1 on a micro benchmark of short-lived objects https://bugs.ruby-lang.org/issues/18929 * Author: mame (Yusuke Endoh) * Status: Open * Priority: Normal * Assignee: peterzhu2118 (Peter Zhu) * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN ---------------------------------------- ``` $ time ruby -ve '10000000.times { Object.new }' ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux] real 0m2.503s user 0m2.484s sys 0m0.016s $ time ./local/bin/ruby -ve '10000000.times { Object.new }' ruby 3.2.0dev (2022-07-20T00:40:59Z master e330dceb3f) [x86_64-linux] real 0m3.074s user 0m3.016s sys 0m0.052s ``` I plotted a graph for daily commits in this year: ![](clipboard-202207201713-zs81l.png) We can see a clear slowdown before and after 2022-05-09. As far as I checked each commit on the day, https://github.com/ruby/ruby/commit/85479b34f76d5b426c2a8224d8ed6d8c2ad81ca2 seems a trigger, but reverting this commit did not change the performance. It's just a microbenchmark, but I think there may be room for improvement. @peterzhu2118 Could you check it out? ---Files-------------------------------- clipboard-202207201713-zs81l.png (18.2 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: