[wp-trac] [WordPress Trac] #32156: Input lag following 4.2.1 update

[WordPress Trac]

#32156: Input lag following 4.2.1 update
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 Reporter:  MarioKnight                      |      Owner:
     Type:  defect (bug)                     |     Status:  new
 Priority:  normal                           |  Milestone:  Awaiting Review
Component:  Administration                   |    Version:  4.2
 Severity:  normal                           |   Keywords:
  Focuses:  ui, administration, performance  |
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 Earlier today following the auto-update, it was reported to me that when
 editing a page with a high amount of text, when typing there is a delay
 from the keystroke to the visual of the key being pressed.  This initially
 made no sense to me, as such things I believe were handled by the local
 machine, with nothing going to the server until the user saves or the
 autosave occurs each minute (or whatever the increment is set to).
 However, I was able to replicate this at my workstation.  I had edited
 that page hours prior when the site was still 4.2 with no issues.  I have
 also been able to replicate the issue on my personal laptop.  It feels odd
 to report such a thing, but with two of us having the same behavior
 between three systems where the only change was the update from 4.2 to
 4.2.1 (which I can confirm as I run the server).  I'm not sure how I can
 state a good method for replication, I haven't determined what size
 threshold exists between no lag and lag.  I can try to obtain any further
 information if someone can let me know what is needed.  Thank you.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32156>
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