ajaxorg/ace — comment on commit 9ab8d986cdbe799a7251254bf29b229dc12c6955
File:  line 0
By fjakobs:

The problem with requestAnimationFrame on webkit was that the event wasn't triggered at all when the loading ace was in a background tab. The result was that the render queue wasn't flushed and the editor was not updated. That's why I want to stay away from it.