It seems that the full changelog of the 1.07 patch has lots of performance tweeks. "
- Introduces a number of improvements in the game streaming system. Players should experience fewer blurred textures, NPC spawn times should be markedly reduced, and there should be an overall improvement in the speed with which game assets are loaded. Streaming system improvements should be most noticeable on consoles and systems with non-SSD drives.
- Improves performance in the swamps of the No Man’s Land region.
- Fixes an issue whereby the presence of fog could adversely affect game performance.
- Optimizes various FX which should result in improved performance during the Battle of Kaer Morhen quest.
- Introduces a number of optimizations that improve overall performance throughout the game.
- Improves overall game performance.