The previous implementation relied on a background thread to wake up the
main thread,
which was prone to priority inversion under heavy load.
In a synthetic test, where we spawn 200 git processes while doing a 5ms
timeout, the old version blocked for 5-80ms, the new version blocks for
5.1-5.4ms.
Release Notes:
- Improved responsiveness of the main thread under high system load
One contributor to some beach-balls was that the main thread was calling
block_with_timeout, but the timeout never fired.
Release Notes:
- Reduced main thread hangs under very high system load
With upcoming release of 1.76 I did a check of current +beta (which
seems to already be at 1.77). These would cause CI pipeline failures
once 1.77 is out.
Release Notes:
- N/A
I essentially went through the publicly exported items and marked these
that are e.g. leaky reexports as pub(crate). I expect that'd be done on
Tuesday anyways.
Release Notes:
- N/A
