How much overhead is there when creating a thread?

Question

I just reviewed some really terrible code - code that sends messages on a serial port by creating a new thread to package and assemble the message in a new thread for every

Answer 1

Interesting.

I tested with my FreeBSD PCs and got the following results:

FreeBSD 12-STABLE, Core i3-8100T, 8GB RAM: 9.523sec

FreeBSD 12.1-RELEASE, Core i5-6600K, 16GB: 8.045sec

You need to do

sysctl kern.threads.max_threads_per_proc=500100

though.

Core i3-8100T is pretty slow but the results are not very different. Rather the CPU clocks seem to be more relevant: i3-8100T 3.1GHz vs i5-6600k 3.50GHz.