[wp-trac] [WordPress Trac] #33322: Theme Installer: spinner animated GIF and high CPU usage

[WordPress Trac]

#33322: Theme Installer: spinner animated GIF and high CPU usage
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 Reporter:  afercia       |       Owner:  wonderboymusic
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  4.4
Component:  Themes        |     Version:  4.2
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  ui, javascript
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Comment (by afercia):

 Refreshed patch. Using the same CSS technique experimented in #33311 the
 re-painted area is now just 20px x 20px, see the screenshot below. The CPU
 usage is now noticeably lower in Chrome and a bit lower in Firefox even
 '''while''' the spinner is being displayed. I'd recommend to consider
 using this CSS technique wherever a background spinner is used in the
 admin.
 Tried also to cache a bit `this.$el`.

 [[Image(https://cldup.com/AWjm1-iVse.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/33322#comment:11>
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