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by kthielen 3032 days ago
You might be interested in hobbes, it's free and open source, and we use it with some very large/complex data sets:

https://github.com/Morgan-Stanley/hobbes

The PL is a little different (very similar to Haskell), interoperation with C/C++ is much more direct, and it's also suitable for low-latency applications (where the boxing overhead in K would be unsuitable).