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Fighting spam with Haskell at Meta (2015)
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Haskell isn’t a common choice for large production systems like Sigma, and in this post, we’ll explain some of the thinking that led to that decision. Asynchronous exceptions allow us to write most of most of our code ignoring the potential for summary termination and still have all the nice guarantees that we need in the event that the limit is hit, including safe releasing of resources, closing network connections, and so forth. To enable this workflow in Haskell, we needed the GHCi environment to work with our full stack, including making requests to other back-end services from the command line.
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