Module procstat 

Thread counts from /proc/<pid>/stat.

sysinfo only knows a process’s threads when it refreshes every thread as well (/proc/<pid>/task/*), which costs several reads per thread on every sample: on a desktop with thousands of browser and Electron threads, that is most of the collection time. The count itself is one field of the process’s own stat file.

Structs

ProcStat

What is read from a process’s stat line.

Functions

read

The thread count and nice value of pid, from one read of its stat.

thread_count

Number of threads of pid, or None if it is gone or unreadable.