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It’s blazingly fast for pure number / text crunching. As in: I use it to ingest terabytes of data files / JSON / logs at speeds indistinguishable from C but with the convenience of programming in something like ruby.

Once replaced a python script while it was running. Expected time, python: 12 hours. Time to get it running in Crystal: 20 min. Time to finish in Crystal: 12 minutes.

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> Once replaced a python script while it was running. Expected time, python: 12 hours. Time to get it running in Crystal: 20 min. Time to finish in Crystal: 12 minutes.

Can you please elaborate on this?

Reallity probably is that code was not optimized python which was writen as POC and not touched after initial write. Python is usually fast enough when using numpy,scipy etc.

At that point, you're not really "writing Python", though. You're really using Python to orchestrate a bunch of native transformations.

> Python is usually fast enough when not using python

Agreed.

These are the python scripts: https://github.com/jonadsimon/entendrepreneur/tree/master/pr...

I don’t do enough python to judge them. But, then again, I had even less experience in Crystal back when I worked on this.

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