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Haskell is a purely functional programming language, featuring static typing, lazy evaluation, and monadic effects. The primary implementation is GHC, a high-performance compiler with a runtime supporting many forms of parallelism and concurrency.
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Action to transmit queued messages over a socket
I'm not familiar with the libraries and types you're using here, but I see a few general Haskell things:
Instead of loopAction <- atomically $ ...; loopAction, you can use join $ atomically $ .... … This is perhaps an excess of specialized utility functions, but I feel it is reasonable because the experienced Haskell programmer will understand what they do simply from seeing their names. …