Speed up for-loop with multithreading

[goerch]

@Himbeersternchen

I know, time2 > time because of overhead, which means, starting 4 Threads costs more time than directly running it without parallelism.

Correct, here is what I see using @btime:

  27.400 μs (1023 allocations: 43.67 KiB)
  5.283 μs (2 allocations: 64 bytes)
  5.267 μs (1 allocation: 16 bytes)

@Himbeersternchen

But i still want to ask, is there any chance to speed up this for-loop? Maybe i should write more efficient codes?

If you need more speed, this MWE doesn’t seem to be representative for your real problem? I can’t estimate if your problem size is bigger or if this represents a hot loop, which is executed a lot of times?