Rapid prototyping with GHCi: hot reloading of running components and reload-surviving values https://github.com/esoeylemez/rapid

Latest on Hackage:0.1.4

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BSD3 licensed and maintained by Ertugrul Söylemez


This is a helper library for rapid prototyping in GHCi sessions. It provides hot-reloadable background threads as well as values that can be reused across module reloads (to save initialisation time). Main use cases include the development of long-running applications, especially those with multiple separable units: servers, web applications, interactive user interfaces, etc.

A tutorial-style introduction is contained within the Rapid module.



  • Switched to BSD-3 license.
  • Moved to git.
  • Simplified implementation.


  • Added restartWith and startWith.
  • Better documentation.


  • Minor documentation fixes.


  • Initial release.
Depends on 5 packages:
Used by 1 package:
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