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Re:38% of bugs at Airbnb could have been prevented by using ... by jashmatthews on Monday February 11, 2019 @07:28AM (#19133908)
JRuby doesn't have a GIL to begin with so there's no requirement to use multiprocessing to host Rails apps etc.

They're an improvement over a single GIL but not by much. IIUC, they're like Racket's Places: a complete duplication of the VM but sharing an address space. The basic implementation doesn't really save much memory but it's a bit more convenient.

There's been a couple of attempts to implement subinterpreters for CRuby too.

Re:38% of bugs at Airbnb could have been prevented by using ... by regularfry on Monday February 11, 2019 @10:10AM (#19134954)
JRuby is an incredibly underrated piece of kit. That startup time, though...