[wp-trac] [WordPress Trac] #57814: Use `wp_theme_has_theme_json` in `_wp_theme_json_webfonts_handler`

[WordPress Trac]

#57814: Use `wp_theme_has_theme_json` in `_wp_theme_json_webfonts_handler`
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 Reporter:  spacedmonkey   |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Script Loader  |     Version:  6.0
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:  performance
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Comment (by spacedmonkey):

 As you can see from the above graphs, marked render start much early if
 font system is not loaded. At 32ms mark instead of 38ms mark. Meaning part
 start to render faster if this is conditionally loaded.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57814#comment:1>
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