[wp-trac] [WordPress Trac] #57645: Implement lazy loading term meta in WP_Term_Query

[WordPress Trac]

#57645: Implement lazy loading term meta in WP_Term_Query
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 Reporter:  spacedmonkey              |       Owner:  spacedmonkey
     Type:  enhancement               |      Status:  closed
 Priority:  normal                    |   Milestone:  6.3
Component:  Taxonomy                  |     Version:  4.4
 Severity:  normal                    |  Resolution:  fixed
 Keywords:  has-patch has-unit-tests  |     Focuses:  performance
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Changes (by spacedmonkey):

 * owner:  (none) => spacedmonkey
 * status:  new => closed
 * resolution:   => fixed


Comment:

 In [changeset:"55671" 55671]:
 {{{
 #!CommitTicketReference repository="" revision="55671"
 Taxonomy: Always lazily load term meta.

 In [34529] introduced lazy loading of term meta. However, this was only in
 the context of `WP_Query`. Other parts of the codebase, like
 `WP_Term_Query` did not lazily load term meta. In this change, calls to
 `update_termmeta_cache` are now replaced with `wp_lazyload_term_meta`,
 that instead of priming term meta caches, just adds them to the queue to
 be primed it ever called. This results in far less database queries, as
 there a number of places where term meta is being primed unnecessarily and
 never used. Adding everything to the term meta queue, also means that if
 term meta is used, that is all loaded in a single database / cache call.

 Props spacedmonkey, mukesh27, peterwilsoncc.
 Fixes #57645.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/57645#comment:7>
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