std/cpuinfo

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This module implements a proc to determine the number of CPUs / cores.

Example:

import std/cpuinfo
doAssert countProcessors() > 0

Procs

proc countProcessors(): int {....gcsafe, extern: "ncpi$1", raises: [], tags: [].}
Returns the number of the processors/cores the machine has. Returns 0 if it cannot be detected.   Source   Edit