[wp-trac] [WordPress Trac] #25969: MP6: admin menu transition causes considerable lag

[WordPress Trac]

#25969: MP6: admin menu transition causes considerable lag
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 Reporter:  johnbillion                  |       Owner:
     Type:  defect (bug)                 |      Status:  new
 Priority:  lowest                       |   Milestone:  3.8
Component:  Administration               |     Version:  trunk
 Severity:  minor                        |  Resolution:
 Keywords:  ui-focus needs-ui has-patch  |
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Comment (by iammattthomas):

 The sidebar needs to be set to display: none by default for small screens,
 and display: block when the .wp-responsive-open class is set. This
 eliminates the flash of the standard sidebar when switching between
 portrait and layout on a tablet, or when resizing a desktop browser
 window. It also eliminates the flash of the sidebar on Windows Phone 8
 devices. Because we're now setting the display property, the transition
 has no effect, so it can be removed. This eliminates quite a bit of the
 jankiness on mobile devices and speeds up the performance of the sidebar.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25969#comment:9>
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