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    <p>At Galois we use Haskell for two things:</p> <ul> <li>Soft real time (OS device layers, networking), where 1-5 ms response times are plausible. GHC generates fast code, and has plenty of support for tuning the GC and scheduler to get the right timings.</li> <li>for true real time systems EDSLs are used to generate code for other languages that provide stronger timing guarantees. E.g. Cryptol, Atom and Copilot.</li> </ul> <p>So be careful to distinguish the EDSL (Copilot or Atom) from the host language (Haskell).</p> <hr> <p>Some examples of critical systems, and in some cases, real-time systems, either written or generated from Haskell, produced by Galois.</p> <p><strong>EDSLs</strong></p> <ul> <li><a href="http://www.cs.indiana.edu/~lepike/pub_pages/rv2010.html" rel="nofollow noreferrer">Copilot: A Hard Real-Time Runtime Monitor</a> -- an DSL for real-time avionics monitoring</li> <li><a href="http://corp.galois.com/blog/2009/2/5/equivalence-and-safety-checking-in-cryptol.html" rel="nofollow noreferrer">Equivalence and Safety Checking in Cryptol</a> -- a DSL for cryptographic components of critical systems</li> </ul> <p><strong>Systems</strong></p> <ul> <li><a href="https://galois.com/project/halvm/" rel="nofollow noreferrer">HaLVM</a> -- a lightweight microkernel for embedded and mobile applications</li> <li><a href="http://corp.galois.com/trusted-services-engine-tse/" rel="nofollow noreferrer">TSE</a> -- a cross-domain (security level) network appliance </li> </ul>
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    1. COawesome, thank you very much! Yes, I understand the difference between the EDSL used as a code generator and the host language itself - sorry if I was unclear in the text of the question. My reason for putting it into "in haskell" category was that using a stricter language like Haskell one might (?) avoid the more "mechanical" bugs like boundary checks, double frees, etc., assuming enough of the semantics is expressed within the EDSL - that's one of my speculations that I am trying to understand whether it is true or false.
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