The future of concurrent programming

[Sean Kelly]

Jeff Nowakowski wrote:
> freeagle wrote:
>> Why do people think there is a need for another language/paradigm to 
>> solve concurrent problem? OSes deal with parallelism for decades, 
>> without special purpose languages. Just plain C, C++. Just check Task 
>> manager in windows and you'll notice there's about 100+ threads running.
> 
> Why limit yourself to hundreds of threads when you can have thousands?

Because context switching is expensive.  Running thousands of threads on 
a system with only a few CPUs may use more time simply switching between 
threads than it does executing the thread code.


Sean