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by Person5478 1953 days ago
yeah, Heroku infamously had a really hard time getting Ruby to scale well.

Ruby traded safety (GIL) for absolutely speed, although it should be noted that Ruby's C interfaces do allow you to op out of the GIL, which means if speed is absolutely paramount you can write a Ruby C extension to opt out of it.

I've done it in the past, but OTOH if you're to that point maybe Ruby no longer makes sense.