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Subject: Re: [boost] interest in an asynchronous linear algebra library?
From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2015-11-22 14:30:40

> > Anyways, while HPX supports distributed computing, you don't have to
> > use it
> > for this. HPX can be used just fine for SMP style (local only)
> > applications
> > as well. In fact we have shown that by simply switching from
> > std::async/std::future to hpx::async/hpx::future you can achieve a
> > speedup
> > of up to a factor of 3-4 (depending on the application).
> This for example would be a reason for me to provide a default
> implementation using std::future that i can exchange by the hpx::
> versions using a preprocessor directive.
> Btw:
> is there a specific reason for that speedup? is there just less overhead
> of the implementation or is it improved scheduling of tasks?

It's mainly because of a) very efficient user level threading, and b) low
overhead synchronization primitives.

Regards Hartmut

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