Though why does fetch(r[1]) not work? Wouldnt one expect it to give the
result a specific worker calculated?
Do I always need a reduction operator? in this case vcat, right?
The other question was maybe more fundamental (and simple?):
Why is the calculation so much faster with a @async prefix?
Does this prefix also work serial? I tried it and he does sth but the
result is: Task (done) @0x00000000828ec710
Is an accompanied @sync begin ... end mandatory or not?
And what exactly does "completion" mean in this sense? Like the @sync waits
for the other workers to complete ?
Say each worker has a task and then @sync makes sure that every worker
finished his task before the next one is given to each worker?
