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a22fabc2a1
In the process of switching to MessageChannel, it seems the postMessage call was modified to pass `"*"` (originally the target origin value from `window.postMessage`). This actually ends up triggering serialization, whereas passing `undefined` bypasses. To save some investigation, passing a Number like `0` still incurs serialization overhead - `undefined` has special behavior.
scheduler
This is a package for cooperative scheduling in a browser environment. It is currently used internally by React, but we plan to make it more generic.
The public API for this package is not yet finalized.
Thanks
The React team thanks Anton Podviaznikov for donating the scheduler package name.