Slow render speed for complex forms about form

[vladra]

And actually this approach doesn't work if I need to change form state outside of specific input field (for example load data to form on button click)

[tannerlinsley]

How does your form grow? Do you simply have a lot of inputs? Or do you have extremely deep objects as your values?

[vladra]

I have form which is built based on values it has, with ability to add new values. For example tariffs[0].name, tariffs[0].price. About 30-40 fields on average. 10-15 of them are multiselects, few text inputs and others are selects.

I've found the you provide access to formAPI via context, so this solved my problem for now. I still need to store input value somewhere (outside of form state), to be able to compare current formValue (accessible via context formAPI) with previous (stored inside of input component).

Don't think it's possible to speed it up without shouldComponentUpdate. Also if there was an easy way to access previous value (without storing it manually), that could be useful.

Anyway, if you have better approach, let me know :)

[tannerlinsley]

Yeah, optimizing for extremely large forms here would potentially touch all points of the library, so I think we need to ponder how we would accomplish this a bit more before we go diving in :)

Closing this issue for now since you were able to skirt around things with access to the internal state, but let's keep the discussion going as we find better ways to optimize things.