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Add bit about YJIT to NEWS.md

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Maxime Chevalier-Boisvert 2021-10-20 15:51:07 -04:00 committed by Alan Wu
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commit 8684946b21
Notes: git 2021-10-21 08:16:07 +09:00 
Merged: https://github.com/ruby/ruby/pull/4997
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NEWS.md
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@ -282,6 +282,16 @@ Excluding feature bug fixes.
* `RubyVM::MJIT` is renamed to `RubyVM::JIT`. [[Feature #17490]]
### YJIT: New experimental in-process JIT compiler
* Disabled by default, use `--yjit` command-line option to enable YJIT.
* Performance improvements on most real-world software, up to 22% on railsbench, 39% on liquid-render.
* Fast warm-up times.
* Limited to macOS & Linux on x86-64 platforms for now.
## Static analysis
### RBS