The problem is that it's really nasty to declare all your functions nogil, because that means you don't get exception handling. There may be a trick to this that I've missed --- I find the GIL handling stuff in Cython sort of confusing.
I think my applications are genuinely hard to multi-thread, so maybe it's usually easier than I've found it. It doesn't help that I use a Macbook Air, and OpenMP isn't available for CLang. Developing on OSX sucks sometimes.
I'v had a lot of success with cython's parallelism. The key is to release the GIL in tight inner functions of big loops. You can then parallelize the loop by iterating over calls to the nogil function or "with nogil" block.
The support for only openmp kind of sucks, but I'm working on a Linux cluster so it doesn't bother me except when I'm on my laptop.
http://docs.cython.org/src/userguide/parallelism.html
The problem is that it's really nasty to declare all your functions nogil, because that means you don't get exception handling. There may be a trick to this that I've missed --- I find the GIL handling stuff in Cython sort of confusing.
I think my applications are genuinely hard to multi-thread, so maybe it's usually easier than I've found it. It doesn't help that I use a Macbook Air, and OpenMP isn't available for CLang. Developing on OSX sucks sometimes.