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Editor: Use a non-persistent object cache in `wp_get_global_settings()`. 

This changeset is part of a greater effort to enhance the caching strategy for `theme.json` based data. Similar to [55138] and [55148], the cache is currently ignored when `WP_DEBUG` is on to avoid interrupting the theme developer's workflow.

This addition of a non-persistent cache results in a significant performance improvement for the overall load time of WordPress, with the Server-Timing load metric being ~8% faster and Time to First Byte being 25+% faster than before.

Props oandregal, spacedmonkey, hellofromtonya, flixos90, azaozz, aristath.
Fixes #57502.

Built from https://develop.svn.wordpress.org/trunk@55155


git-svn-id: http://core.svn.wordpress.org/trunk@54688 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Felix Arntz 2023-01-27 22:14:12 +00:00
parent 5df3679f34
commit fef356b375
2 changed files with 56 additions and 4 deletions
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58
wp-includes/global-styles-and-settings.php
View File

@ -25,15 +25,65 @@
*/
function wp_get_global_settings( $path = array(), $context = array() ) {
if ( ! empty( $context['block_name'] ) ) {
$path = array_merge( array( 'blocks', $context['block_name'] ), $path );
$new_path = array( 'blocks', $context['block_name'] );
foreach ( $path as $subpath ) {
$new_path[] = $subpath;
}
$path = $new_path;
}
/*
* This is the default value when no origin is provided or when it is 'all'.
*
* The $origin is used as part of the cache key. Changes here need to account
* for clearing the cache appropriately.
*/
$origin = 'custom';
if ( isset( $context['origin'] ) && 'base' === $context['origin'] ) {
if (
! wp_theme_has_theme_json() ||
( isset( $context['origin'] ) && 'base' === $context['origin'] )
) {
$origin = 'theme';
}
$settings = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_settings();
/*
* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
* See `wp_cache_add_non_persistent_groups` in src/wp-includes/load.php and other places.
*
* The rationale for this is to make sure derived data from theme.json
* is always fresh from the potential modifications done via hooks
* that can use dynamic data (modify the stylesheet depending on some option,
* settings depending on user permissions, etc.).
* See some of the existing hooks to modify theme.json behaviour:
* https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
*
* A different alternative considered was to invalidate the cache upon certain
* events such as options add/update/delete, user meta, etc.
* It was judged not enough, hence this approach.
* See https://github.com/WordPress/gutenberg/pull/45372
*/
$cache_group = 'theme_json';
$cache_key = 'wp_get_global_settings_' . $origin;
/*
* Ignore cache when `WP_DEBUG` is enabled, so it doesn't interfere with the theme
* developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
$can_use_cached = ! WP_DEBUG;
$settings = false;
if ( $can_use_cached ) {
$settings = wp_cache_get( $cache_key, $cache_group );
}
if ( false === $settings ) {
$settings = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_settings();
if ( $can_use_cached ) {
wp_cache_set( $cache_key, $settings, $cache_group );
}
}
return _wp_array_get( $settings, $path, $settings );
}
@ -317,5 +367,7 @@ function wp_theme_has_theme_json() {
*/
function wp_clean_theme_json_cache() {
wp_cache_delete( 'wp_get_global_stylesheet', 'theme_json' );
wp_cache_delete( 'wp_get_global_settings_custom', 'theme_json' );
wp_cache_delete( 'wp_get_global_settings_theme', 'theme_json' );
WP_Theme_JSON_Resolver::clean_cached_data();
}

2
wp-includes/version.php
View File

@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.2-alpha-55154';
$wp_version = '6.2-alpha-55155';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.