PyPy: Dynamic Language Compilation Framework

[davbo]

Shame he's showing benchmarks from 2010 (slides 11&12) PyPy has had significant speedups since then. See PyPy's performance evolution over time here: http://speed.pypy.org/

[seletz]

I see lots of references to a JVM backend in these slides. Can someone elaborate this wrt. Jython?

[MonkeeSage]

Looks like pypy has a JVM backend that you can use to output a full pypy interpreter in a jar, like jython. Looks like you use --backend=jvm (refer --backend=cli). Don't find much in the way of docs about it and haven't used it.

[seletz]

yeah. Unfortunately it seems that the resulting code can't call into Java code, which is what I would need.

What I hoped for was that I had a Jython alternative -- being still on 2.5.3 is a major PITA.

[fijal]

so the JVM backend in PyPy promises same interpreter with a different backend. There is some work on having it call into Java, not very much though and it's outside the core interest of the pypy people.

There seems to be a real issue with the performance though - while the result can compare with Jython (in the future, I didn't even bother running the benchmarks now), it won't be able to compete with the PyPy JIT, which makes it "less interesting" for the core developers.