Provides API for timer based execution of IO actions

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LTS Haskell 16.31:
Stackage Nightly 2020-06-16:
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BSD-3-Clause licensed by Moritz Clasmeier
Maintained by [email protected]
This version can be pinned in stack with:async-timer-,1983

Module documentation for

async-timer Hackage version Stackage version Build Status


This is a lightweight package built on top of the async package providing easy to use periodic timers. This can be used for executing IO actions periodically.


      let conf = defaultTimerConf & timerConfSetInitDelay  500 -- 500 ms
                                  & timerConfSetInterval  1000 -- 1 s
      withAsyncTimer conf $ \ timer -> do
        forM_ [1..10] $ \_ -> do
          timerWait timer
          putStrLn "Tick"