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add a NEWS entry about cvar inline cache

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Koichi Sasada 2021-12-25 00:01:21 +09:00
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NEWS.md
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@ -420,6 +420,9 @@ Note: Excluding feature bug fixes.
## Implementation improvements
* Inline cache mechanism is introduced for reading class variables.
[[Feature #17763]]
* `instance_eval` and `instance_exec` now only allocate a singleton class when
required, avoiding extra objects and improving performance. [[GH-5146]]
@ -600,6 +603,7 @@ See [the repository](https://github.com/ruby/error_highlight) in detail.
[Feature #17744]: https://bugs.ruby-lang.org/issues/17744
[Feature #17750]: https://bugs.ruby-lang.org/issues/17750
[Feature #17762]: https://bugs.ruby-lang.org/issues/17762
[Feature #17763]: https://bugs.ruby-lang.org/issues/17763
[Feature #17795]: https://bugs.ruby-lang.org/issues/17795
[Feature #17798]: https://bugs.ruby-lang.org/issues/17798
[Bug #17827]: https://bugs.ruby-lang.org/issues/17827