[wp-trac] [WordPress Trac] #57548: Stop concatenating scripts and stylesheets in wp-admin and retire load-scripts.php and load-styles.php

[WordPress Trac]

#57548: Stop concatenating scripts and stylesheets in wp-admin and retire load-
scripts.php and load-styles.php
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 Reporter:  azaozz         |      Owner:  (none)
     Type:  enhancement    |     Status:  new
 Priority:  normal         |  Milestone:  Future Release
Component:  Script Loader  |    Version:
 Severity:  normal         |   Keywords:
  Focuses:                 |
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 This functionality was added 14 years ago, #8628. At the time it made the
 loading of wp-admin quite faster by reducing the number of HTTP requests
 by more than 50%. The downside is that each wp-admin page has it's own set
 of concatenated scripts and stylesheets making them harder for caching in
 browser/network caches. Nevertheless the benefits of the reduced number of
 requests was greater than the insufficient caching.

 This changed when HTTP/2 became more popular. Scripts and stylesheets are
 loaded much more efficiently there and concatenation is generally not
 needed. This allows for better browser/network caching and for eventual
 prioritization. In that terms disabling concatenation of scripts and
 stylesheets in wp-admin would reduce complexity and improve performance in
 many cases.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57548>
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