[ripley12]

Yes, I think you're generally right. I'm a big fan of this blog post: https://eli.thegreenplace.net/2018/measuring-context-switchi...

> The numbers reported here paint an interesting picture on the state of Linux multi-threaded performance in 2018. I would say that the limits still exist - running a million threads is probably not going to make sense; however, the limits have definitely shifted since the past, and a lot of folklore from the early 2000s doesn't apply today. On a beefy multi-core machine with lots of RAM we can easily run 10,000 threads in a single process today, in production. As I've mentioned above, it's highly recommended to watch Google's talk on fibers; through careful tuning of the kernel (and setting smaller default stacks) Google is able to run an order of magnitude more threads in parallel.

[riku_iki]

so, in that benchmark, context switch is comparable to copying 64k mem, which is kinda significant, I run some heavy load database with few hundreds threads, and see that it does 100k context switching per sec some times.