@facebook-github-bot facebook-github-bot released this Oct 1, 2018 · 301 commits to master since this release

Assets 7

Likely to cause new Flow errors:

  • Removed the ability to use functions as type annotations. This ability was
    originally designed to support ES3-style classes, but in practice causes
    confusion and missed errors. We found that the vast majority of added errors
    were detecting legitimate bugs, and the remainder could be easily updated to
    ES6 classes.

New Features:

  • Added worker utilization and GC profiling under the --profile mode.


  • Further improved performance of IDE requests on large codebases.
  • Tweaked OCaml GC settings to reduce time spent collecting on workers.
  • Improved performance and reliability of watchman integration.