[wp-trac] [WordPress Trac] #64066: Speculative Loading: Change default eagerness from conservative to moderate when caching is detected

[WordPress Trac]

#64066: Speculative Loading: Change default eagerness from conservative to moderate
when caching is detected
-------------------------------------+-------------------------------------
 Reporter:  westonruter              |       Owner:  (none)
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  6.9
Component:  General                  |     Version:  6.8
 Severity:  normal                   |  Resolution:
 Keywords:  2nd-opinion has-patch    |     Focuses:  performance,
  needs-unit-tests                   |  sustainability
-------------------------------------+-------------------------------------

Comment (by westonruter):

 Here's some plugin code that a host could, for example, drop into an `mu-
 plugin` to enable `moderate` eagerness by default unless a plugin (e.g.
 [https://wordpress.org/plugins/speculation-rules/ Speculative Loading])
 had set it to be something else:

 {{{#!php
 <?php
 add_filter(
         'wp_speculation_rules_configuration',
         /**
          * @param array<string, string>|null|mixed $config Config.
          * @return array<string, string>|null Filtered config.
          */
         static function ( $config ): ?array {
                 // A plugin turned off Speculative Loading.
                 if ( null === $config ) {
                         return null;
                 }

                 // In case a plugin returned a bad value to a filter.
                 if ( ! is_array( $config ) ) {
                         $config = array();
                 }

                 // See <https://github.com/WordPress/wordpress-
 develop/blob/e1008a31dfcf6e9c395fa7f744139d11b2c1d9a7/src/wp-includes
 /speculative-loading.php#L21-L24>.
                 $config = array_merge(
                         array(
                                 'mode'      => 'auto',
                                 'eagerness' => 'auto',
                         ),
                         $config
                 );

                 // Use a default eagerness of moderate if auto remains
 after all filters applied.
                 if ( 'auto' === $config['eagerness'] ) {
                         $config['eagerness'] = 'moderate';
                 }

                 return $config;
         },
         PHP_INT_MAX // Allow other plugins (e.g. Speculative Loading) to
 easily override.
 );
 }}}

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/64066#comment:7>
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