Hi Kristján: --- On Tue, 9/29/09, Kristján Valur Jónsson <kristjan@ccpgames.com> wrote:

I've been exporing the bowels of Stackless a bit in the last weeks and am somewhat familiar with the topic.

Thanks a lot for the detailed description! As per Armin's suggestion, I will move this thread to the stackless mailing list.

I have not done any performance measurements to evaluate the merits of soft switching. But I must confess that the presence of soft-switching makes stackless much more difficult to understand for me. And a lot of the diff between trunk python and stackless python is because of the boilerplate code required to get soft switching to work.

Well I came across two slides in the "Stackless Python and PyPy Nults and Bolts" talk. It states that soft switching is 100 x faster than a thread. Hard switching is 10 x. I don't know if this fact is helpful.

I hope this clears things up.

It helps. I need to learn a lot more to better use the information you have given me. Cheers, Andrew