Applying a modifer in edit mode with modifer key (A) is now theoretically up to 1000x faster or more in some situations, but more realistically usually around 2-5x faster. This is with an experimental optimization.

Unwrap in Place is now up to 10x faster in some cases when heavy modifers are used.

By optimizing many of the functions, Unwrap in Place on simple meshes with no modifers present should be general faster, from 0.039ms to 0.0265ms and from 2.9s to 1.3s Unwrap in Place is now almost as fast as the regular unwrap on a singel object, 5s vs 4.5s on 63k tris.

It is now up to 3x faster when unwraping many objects at once.

Unwrap in Place with uv sync off on many objects (totall 4mil tris) in edit mode whent from 39s to to 4s.

Fix so that hide state stays the same after an unwrap inplace with uv sync turned off.

A bug that prevented Unwrap in Place from unwraping an object sometimes correctly is now fixed.

The active modifer index is now restored after using Unwrap in Place so the active modifer will stay the same.

Fixed many bugs that was introduced because of 4.1

New option in fast merge (defualt now) to merge to nearest vert if no activ vert can be found