[wp-trac] [WordPress Trac] #45068: Specific CSS attribute slows down customizer panels on Chrome and Opera

[WordPress Trac]

#45068: Specific CSS attribute slows down customizer panels on Chrome and Opera
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 Reporter:  Themezly           |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  Customize          |     Version:  4.9.8
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
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Changes (by Themezly):

 * keywords:  dev-feedback => reporter-feedback


Comment:

 No it will slow it down, here is better explanation

 https://github.com/ThemeFuse/Unyson/issues/3620

 basically if you add space after a class and use specific attribute lookup
 like

 .class [data-something]

 it kills the rendering because of that very little space in between the
 class and specific attribute

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Ticket URL: <https://core.trac.wordpress.org/ticket/45068#comment:5>
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