# Changelog

## [0.10.1] - 2021-05-01
### Changed
- Improve error reporting.
### Fixed
- Fix compilation for 32-bit OS.

## [0.10.0] - 2021-02-09
### Added
- Memory-mapped file access can now be disabled by setting `Options.FileSystem` to `fs.OS`. 
### Changed
- The default file system implementation is changed to `fs.OSMMap`.

## [0.9.2] - 2021-01-01
### Changed
- Write-ahead log doesn't rely on wall-clock time anymore. It prevents potential race conditions during compaction and recovery.
### Fixed
- Fix recovery writing extra delete records.

## [0.9.1] - 2020-04-03
### Changed
- Improve Go 1.14 compatibility (remove "unsafe" usage).

## [0.9.0] - 2020-03-08
### Changed
- Replace the unstructured data file for storing key-value pairs with a write-ahead log.
### Added
- In the event of a crash or a power loss the database is automatically recovered.
- Optional background compaction allows reclaiming disk space occupied by overwritten or deleted keys.
### Fixed
- Fix disk space overhead when storing small keys and values. 

## [0.8.3] - 2019-11-03
### Fixed
- Fix slice bounds out of range error mapping files on Windows.

## [0.8.2] - 2019-09-04
### Fixed
- Race condition could lead to data corruption.

## [0.8.1] - 2019-06-30
### Fixed
- Fix panic when accessing closed database.
- Return error opening invalid database.

## [0.8] - 2019-03-30
### Changed
- ~2x write performance improvement on non-Windows.

## [0.7] - 2019-03-23
### Added
- Windows support (@mattn).
### Changed
- Improve freelist performance.