### New features

* [#140](https://github.com/rubocop/rubocop-performance/pull/140): Add new `Performance/CollectionLiteralInLoop` cop. ([@fatkodima][])
* [#137](https://github.com/rubocop/rubocop-performance/pull/137): Add new `Performance/Sum` cop. ([@fatkodima][])

### Bug fixes

* [#159](https://github.com/rubocop/rubocop-performance/pull/159): Fix a false positive for `Performance/AncestorsInclude` when receiver is a variable. ([@koic][])

### Changes

* [#157](https://github.com/rubocop/rubocop-performance/pull/157): Extend `Performance/Detect` cop with check for `filter` method and `Performance/Count` cop with checks for `find_all` and `filter` methods. ([@fatkodima][])
* [#154](https://github.com/rubocop/rubocop-performance/pull/154): Require RuboCop 0.87 or higher. ([@koic][])

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