Bug 236393

Summary:	KeyEvents are limited to one per render frame
Product:	WebKit	Reporter:	Michael Feldstein <msfeldstein>
Component:	UI Events	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	msfeldstein
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Michael Feldstein 2022-02-09 12:00:39 PST

Safari limits text input to one keypress per frame and queues up the rest, while chrome will send all pending keypresses in the next frame.  So if you have any performance issues while typing quickly it will coalesce into extremely poor performance.

In the codepen, if you open it in chrome and bash keys you'll see that it keeps up with your typing, but if you do the same in safari, the events will come in one at a time and the backlog will create coalescing performance issues.

https://codepen.io/msfeldstein/pen/gOXmPWL

Comment 1 Alexey Proskuryakov 2022-02-10 10:27:30 PST


*** This bug has been marked as a duplicate of bug 226954 ***