[brightball]

This is actually one of the reasons I was drawn to Ruby over Python. Ruby also has the GIL but jRuby is an excellent option when needed.

[antod]

I wonder what lead to JRuby attracting support while Jython not? I know the Jython creator went on to other things (was it eg IronPython for dotnet?). I suppose it was the inverse with dotnet - eg IronPython surviving while IronRuby seems dead.

Is it just down to corporate sponsorship?

[brightball]

JRuby has been pretty actively maintained for about 15 years and had a big release this year.

It’s an impressive project.

[krylon]

I looked into it a long time ago (~10-12 years?), and was disappointed JRuby could not use extensions written in C. It's not surprising in retrospect, for obvious reasons, but has there been some progress in this area?

[empthought]

Twitter used JRuby and invested heavily for a time.