Error running concurrent process and storing results in array

[data pulverizer]

On Wednesday, 13 May 2020 at 15:13:50 UTC, wjoe wrote:
> On Friday, 8 May 2020 at 13:43:40 UTC, data pulverizer wrote:
>> [...] I also chose kernel matrix calculations, you can't 
>> always call a library, sometimes you just need to write 
>> performant code.
>
> Aren't kernel function calls suffering a context switch though ?

Why would they?