cache: explore better ways to detect cache changes made by other processes
kresd 5.2.0 does periodic check which might take too long on very busy systems. Maybe we could use some event-based mechanism?
See discussion.
The following discussion from !1042 (merged) should be addressed:
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@pspacek started a discussion: (+1 comment) Why not use https://docs.libuv.org/en/v1.x/guide/filesystem.html#file-change-events ?