I've attempted to rewrite this JS so that the reading and writing are batched. This seems to improve browser performance.
Chrome Devtools performance
Attached is a patch for Drupal 10.1.x → AND 10.2.x → . There's some changes to the file between 10.1.x and 10.2.x. We're still on 10.1.x so I patched them both.
ZHawkins → created an issue.
My attempt at patching this.
ZHawkins → created an issue.
Fixing the patch file number.
Rerolled patch from https://www.drupal.org/project/ckeditor →
ZHawkins → created an issue.
Rerolled patch against 9.5.3.