Commit 28a115e5 authored by Committed by Ben Gamari
base: fdReady(): Improve accuracy and simplify code.
This is done by reusing the existing cross-platform `getProcessElapsedTime()` function, which already provides nanosecond monotonic clocks, and fallback for platforms that don't have those. To do this, `getProcessElapsedTime()` had to be moved from a private RTS symbol into the public interface. Accuracy is improved in 2 ways: * Use of the monotonic clock where available * Measuring the total time spent waiting instead of a sum of intervals (between which there are small gaps) Reviewers: bgamari, austin, hvr, erikd, simonmar Reviewed By: bgamari Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3953
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