From: sam.saffron@... Date: 2018-01-27T06:29:18+00:00 Subject: [ruby-core:85152] [Ruby trunk Feature#8977] String#frozen that takes advantage of the deduping Issue #8977 has been updated by sam.saffron (Sam Saffron). I think this can be closed as complete cause we have `-"test"` now so we can do it. ---------------------------------------- Feature #8977: String#frozen that takes advantage of the deduping https://bugs.ruby-lang.org/issues/8977#change-69890 * Author: sam.saffron (Sam Saffron) * Status: Assigned * Priority: Normal * Assignee: matz (Yukihiro Matsumoto) * Target version: ---------------------------------------- During memory profiling I noticed that a large amount of string duplication is generated from non pre-determined strings. Take this report for example https://gist.github.com/SamSaffron/6789005 (generated using the memory_profiler gem that works against head) ">=" x 4953 /Users/sam/.rbenv/versions/2.1.0-dev/lib/ruby/2.1.0/rubygems/requirement.rb:93 x 4535 This string is most likely extracted from a version. Or "/Users/sam/.rbenv/versions/2.1.0-dev/lib/ruby/gems" x 5808 /Users/sam/.rbenv/versions/2.1.0-dev/lib/ruby/gems/2.1.0/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251 x 3894 A string that can not be pre-determined. ---- It would be nice to have "hello,world".split(",")[0].frozen.object_id == "hello"f.object_id Adding #frozen will give library builders a way of using the de-duping. It also could be implemented using weak refs in 2.0 and stubbed with a .dup.freeze in 1.9.3 . Thoughts ? -- https://bugs.ruby-lang.org/ Unsubscribe: