Stackless is interesting, but I found it to be a little unwieldy when I wrote a volume visualization test. When each task needs access to the entire volume of data, Stackless gets REALLY slow. I didn't look through the Stackless internals the way I looked into Erlang, but the slowdown was undeniable.

Again, for massive datasets, accessed by many cores over a massive number of threads, it needs a little more development.

TEST ALGORITHM:

Standard Volume ray casting. Each pixel processed separately. Ray casted through volume with alpha based early ray termination.