Hacker News Reader

On a 64 core / 512GB RAM server-class machine with 2K tasks, around 20K threads and 12% load, `htop` lags like crazy -- pretty much unusable.

On my system there are 240 tasks running with ~1700 threads. Htop is using 6% of single core with cgroup column disabled and 9% with it enabled. It spends most of the time in kernel space so it's not htops fault.

> While I agree that it is _less_ efficient than some other ways, in what way is that _significant_?

This gets noticeable when every connected user/session runs the htop.

Try many small or tiny processes, and soon htop overhead becomes significant (up to 5% total utilization in my situation), that's not exactly efficient.