2.0.9 - released 2021-01-27

View the release on GitHub


  • Added warning if the curl extension is not enabled as it significantly degrades performance
  • Fixed InstalledVersions to report all packages when several vendor dirs are present in the same runtime
  • Fixed download speed when downloading large files
  • Fixed archive and path repo copies mishandling some .gitignore paths
  • Fixed root package classes not being available to the plugins/scripts during the initial install
  • Fixed cache writes to be atomic and better support multiple Composer processes running in parallel
  • Fixed preg jit issues when config or require modifies large composer.json files
  • Fixed compatibility with envs having open_basedir restrictions
  • Fixed exclude-from-classmap causing regex issues when having too many paths
  • Fixed compatibility issue with Symfony 4/5
  • Several small performance and debug output improvements