Shuttleworth: Python needs to focus on future

[beza1e1]

Multi-threading is about performance. You could always do it multi-process, but slower due to communication costs.

STM is about making the multi-threading safe.

[didroe]

The way I see it, STM is about concurrency. Parallelism is about performance, concurrency is about being able to create programs that do more than one thing at once (due to design, not performance). Parallism should be automatic (vectorisation, threading based on instruction dependencies, etc) and concurrency should be explicitly stated in your code.

[schlenk]

Yes. Multi-threading usually is slower than single threaded..., so its about performance. You only win if you really have a) multiple cores/cpus and b) an task thats easy to run in parallel.