A change in the Chrome scheduler to prioritize rendering after user interaction resulted in multiple improvements to user-experienced Interaction to Next Paint.
Applications with a large amount of typing on desktop saw improvements to their slowest interaction times as many keypresses right after another displayed on screen more quickly.
Mobile sites in which users were tapping multiple times due to slow interactions saw large improvements to interaction times, as 500ms+ interactions no longer “piled up” waiting for the user to stop tapping before the screen began to update.
Source code of the change is linked in the chromium issue tracker
Chrome 109 was released the week of January 10, 2023.
