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react/packages
Andrew Clark 8df7b7911a Remove Passive flag from "before mutation" phase (#20038)
We don't need to visit passive effect nodes during before mutation.

The only reason we were previously was to schedule the root-level
passive effect callback as early as possible, but now that
`subtreeFlags` exists, we can check that instead.

This should reduce the amount of traversal during the commit phase,
particularly when mounting or updating large trees that contain many
passive effects.
2020-10-16 08:21:58 -05:00
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