/ tokio Public
Add a has_changed function to
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sync::watchto tell a bunch of workers to do some work, and once in a while they check to see what's the latest job, and if there's no new job they should keep doing what they're already doing, and currently the only way to do that is via
rex.changed().now_or_never().is_some()which has some
Wakeroverhead (see asm in https://play.rust-lang.org/?version=stable&mode=release&edition=2021&gist=8fdf2f1bf2b6b16827b106dc13ef5895)
has_changedmethod to check if the value had changed.
try_changedfunction that doesn't block if the value hasn't changed.