### New features

* [#446](https://github.com/rubocop/rubocop-performance/pull/446): Support Prism as a Ruby parser (experimental). ([@koic][])

### Bug fixes

* [#437](https://github.com/rubocop/rubocop-performance/issues/437): Fix a false positive for `Performance/ChainArrayAllocation` when using `select` with block argument after `select`. ([@koic][])
* [#448](https://github.com/rubocop/rubocop-performance/issues/448): Fix a false positive for `Performance/RedundantBlockCall` when using `block.call` with block argument. ([@koic][])

### Changes

* [#240](https://github.com/rubocop/rubocop-performance/issues/240): Disable `Performance/Casecmp` cop by default. ([@parkerfinch][])

[@koic]: https://github.com/koic
[@parkerfinch]: https://github.com/parkerfinch
