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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 hard problem?
Is LLVM going to solve the concurrency problem?
Are there solutions other than Multi-core for Hardware advancement?
LLVM is several things together – kind of a virtual machine/optimizing compiler, combined with different frontends that take the input in a particular language and output the result in an intermediate language. This intermediate output can be run with the virtual machine, or can be used to generate a standalone executable.
The problem with concurrency is that, although it was used for a long time in scientific computing, it has just recently has become common in consumer apps. So while it’s widely known how to program a scientific calculation program to achieve great performance, it is completely different thing to write a mail user agent/word processor that can be good at concurrency. Also, most of the current OS’s were being designed with a single processor in mind, and they may not be fully prepared for multicore processors.
The benefit of LLVM with respect to concurrency is that you have an intermediate output, and if in the future there are advances in concurrency, then by updating your interpreter you instantly gain those benefits in all LLVM-compiled programs. This is not so easy if you had compiled to a standalone executable. So LLVM doesn’t solve the concurrency problem per se but it leaves an open door for future enhancements.
Sure there are more possible advances for the hardware like quantum computers, genetics computers, etc. But we have to wait for them to become a reality.