RESOLVED DUPLICATE of bug 226954236393
KeyEvents are limited to one per render frame 
https://bugs.webkit.org/show_bug.cgi?id=236393
Summary KeyEvents are limited to one per render frame
Michael Feldstein
Reported 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
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Alexey Proskuryakov
Comment 1 2022-02-10 10:27:30 PST
*** This bug has been marked as a duplicate of bug 226954 ***
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