Date precision on Windows

Jeroen Frijters jeroen at
Mon Sep 14 13:42:23 UTC 2009

Andrew Haley wrote:
> Please, someone tell me Windows isn't still using the old 18.2 Hz DOS
> timer for its system clock.  Nooooo....

Not that it is true, but why would that be bad?

By default (most) multi core/cpu Windows systems run at a 15 ms timer interrupt interval (10 ms for single cpu/core systems), but programs can request a smaller interval (down to 1 ms).

Running the timer interrupt at a lower frequency helps if you care about throughput and/or battery life.


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