On Wed, Jan 23, 2019 at 7:32 AM Jeroen Demeyer <j.deme...@ugent.be> wrote:
>
> On 2019-01-23 00:11, William Stein wrote:
> > I helped support somebody using the Cygwin
> > version of Sage on Windows at the Sage booth at the Joint Math
> > Meetings last week, and it typically took about 1 minute to start up
> > Sage, which was scary.
>
> But mathematical computations (which do not involve syscalls) shouldn't
> be slower, right?

Generally not.  If they are multi-process (and hence obviously require
system calls to start processes or threads) there is some additional
overhead.  If the  multiprocessing algorithm is using a process pool
this is of course an O(1) cost.  For straight numerical computations
on the CPU there's no major performance problem.

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