[wp-trac] [WordPress Trac] #56990: Render blocking CSS `classic-themes.css` unnecessarily enqueued

[WordPress Trac]

#56990: Render blocking CSS `classic-themes.css` unnecessarily enqueued
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 Reporter:  adamsilverstein          |       Owner:  flixos90
     Type:  defect (bug)             |      Status:  assigned
 Priority:  normal                   |   Milestone:  6.2
Component:  Themes                   |     Version:  6.1
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:  css, performance
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Comment (by flixos90):

 Thanks @patrickmeenan for the additional feedback! There isn't really a
 precedent here, but one thing we cannot do is incorporate those styles in
 the main stylesheet, as it is externally controlled by whichever WordPress
 theme is currently active. So it needs to be separate unfortunately.

 @wpgurudev @scruffian Based on the above feedback, while the performance
 difference is negligible, I'd still lean towards inlining it for slightly
 more benefit. The performance test from
 https://core.trac.wordpress.org/ticket/56990#comment:29 doesn't show a
 clear benefit in either direction, as we have to consider the variance
 between test runs is considerable.

 That being said, it's also safe to say it's not a high priority issue to
 address in terms of performance.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56990#comment:39>
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