From 94b97bdc0039c78a213e0a6170f3037eeb00122e Mon Sep 17 00:00:00 2001
From: Diego Nehab
-Interesting note: as mentioned in some manuals, calling select with both +Interesting note: as mentioned in some Unix manuals, calling select with both sets empty and a non-null timeout is a fairly portable way to sleep with -sub-second precision. +sub-second precision (except it doesn't work on Windows).
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