# ChangeLog
All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
## [4.0.5] - 2023-05-07
### Changed
* [#118](https://github.com/sebastianbergmann/diff/pull/118): Improve performance of `MemoryEfficientLongestCommonSubsequenceCalculator`
* [#119](https://github.com/sebastianbergmann/diff/pull/119): Improve performance of `TimeEfficientLongestCommonSubsequenceCalculator`
## [4.0.4] - 2020-10-26
### Fixed
* `SebastianBergmann\Diff\Exception` now correctly extends `\Throwable`
## [4.0.3] - 2020-09-28
### Changed
* Changed PHP version constraint in `composer.json` from `^7.3 || ^8.0` to `>=7.3`
## [4.0.2] - 2020-06-30
### Added
* This component is now supported on PHP 8
## [4.0.1] - 2020-05-08
### Fixed
* [#99](https://github.com/sebastianbergmann/diff/pull/99): Regression in unified diff output of identical strings
## [4.0.0] - 2020-02-07
### Removed
* Removed support for PHP 7.1 and PHP 7.2
## [3.0.2] - 2019-02-04
### Changed