What is LLVM and How is replacing Python VM with LLVM increasing speeds 5x?

Question

Google is sponsoring an Open Source project to increase the speed of Python by 5x.

Unladen-Swallow seems to have a good project plan

Why is concurrency such a ha

Answer 1

LLVM takes care of the nitty-gritty of code generation, so it lets them rewrite Psyco in a way that's more general, portable, maintainable. That in turn allows them to rewrite the CPython core, which lets them experiment with alternate GCs and other things needed to improve python's support for concurrency.

In other words, LLVM doesn't solve the concurrency problem, it just frees up your hands so YOU can solve it.