issue: Subscription to isValidating via useController causes quadratic amounts of re-renders on submit about react-hook-form HOT 4 CLOSED

This one is probably hard to improve at least it's my limitation at the moment as hookform focuses on field validation, if each input has async validation it will get re-render with validating prop.

from react-hook-form.

Can’t we somehow try to batch/dedupe the rerenders?

from react-hook-form.

Ah, focus in the sense that it scrolls to the field that is validating and it happens in an order? So it goes through each field, sets the global invalidating to true, validates and sets the global isValidating to false and then it continues with the next field?
That would exactly explain the behavior. Maybe we should separate the validation field into two: one for the global process, that is set to true when field validation starts, and is set to false when all fields are done, and a fieldIsValidating that is only switched for the fields one at a time?

from react-hook-form.

as far as i know, it's not as simple as that, if you have multiple async await running at the field level, it would be difficult to batch track without complicating the library impl. As this would be a better tool with something like RXJS instead.

from react-hook-form.