EDGE browser since last patch and last Windows patches extremely slow in input, page load times and

I have had the same problem but with me the issue disappeared when turned off the synchronisation of collections. Not ideal if you want to use collections across other devices but its a work-around for the moment:-

1. Click on the ellipsis (...) three dots on the top right corner of edge.
2. Scroll down to the bottom of the list and Click on settings
3. Select profiles and on the right hand side click on Sync
4. Scroll down to the collections item and click on the slider button to turn off

Hopefully MS will resolve issue soon