Optimise

[hexus]

• https://github.com/mattphillips/deep-object-diff
• https://www.npmjs.com/package/flat

Complete updates are expensive because they update every field regardless of what's changed. This can be optimised by diffing the given data with the current form data, and only updating the leaf paths that changed.

In some situations it may be faster to only update the common ancestors that changed, but typically the form structure is fairly static.

[hexus]

Seems like updating leaf fields is incorrect: some may not exist due to template field processing.

So we need to do one of the following:

• Visit every node still, but ensure no field is updated more than once
• Update the nearest existing common ancestors of all updated paths

[hexus]

That'll do for now.

Full updates only occur if the state property is a different object.

Updates are now fully reliant on updatePath(), which performs a sub-tree update traversal, followed by an ancestor update traversal.

Back to being snappy. ✌️

[hexus]

Actually still an issue, initial update is still revisiting way too many fields.

[hexus]

Fixed lol. 🎉

[hexus]

Value caching is quite wrong on initial update, so this needs reworking.