[wp-trac] [WordPress Trac] #59969: Conditional loading `build_template_part_block_variations` for performance improvement

[WordPress Trac]

#59969: Conditional loading `build_template_part_block_variations` for performance
improvement
------------------------------+--------------------------
 Reporter:  thekt12           |       Owner:  joemcgill
     Type:  defect (bug)      |      Status:  closed
 Priority:  normal            |   Milestone:  6.5
Component:  General           |     Version:
 Severity:  normal            |  Resolution:  fixed
 Keywords:  has-patch commit  |     Focuses:  performance
------------------------------+--------------------------
Changes (by joemcgill):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"57315" 57315]:
 {{{
 #!CommitTicketReference repository="" revision="57315"
 Editor: Support deferred block variation initialization on the server.

 When registering blocks on the server using `register_block_type()` or
 similar functions, a set of block type variations can also be registered.
 However, in some cases building this variation data during block
 registration can be an expensive process, which is not needed in most
 contexts.

 To address this problem, this adds support to the `WP_Block_Type` object
 for a new property, `variation_callback`, which can be used to register a
 callback for building variation data only when the block variations data
 is needed. The `WP_Block_Type::variations` property has been changed to a
 private property that is now accessed through the magic `__get()` method.
 The magic getter makes use of a new public method,
 `WP_Block_Type::get_variations` which will build variations from a
 registered callback if variations have not already been built.

 Props spacedmonkey, thekt12, Mamaduka, gaambo, gziolo, mukesh27,
 joemcgill.
 Fixes #59969.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/59969#comment:39>
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