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Themes: Avoid autoloading the previous theme's theme mods when switching to another theme.

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This reduces unnecessarily autoloaded data from inactive themes, which can contribute to slow database performance as part of excessive autoloading.

Props mukesh27, rajinsharwar, igmoweb, joemcgill, swissspidy, westonruter, flixos90.
Fixes #59537.
See #59975.


git-svn-id: https://develop.svn.wordpress.org/trunk@57153 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Felix Arntz
2023-12-04 19:36:27 +00:00
parent b38a6cf976
commit 7ce1281349
2 changed files with 49 additions and 0 deletions
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7
src/wp-includes/theme.php
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@@ -840,6 +840,13 @@ function switch_theme( $stylesheet ) {
$new_theme->delete_pattern_cache();
$old_theme->delete_pattern_cache();
// Set autoload=no for the old theme, autoload=yes for the switched theme.
$theme_mods_options = array(
'theme_mods_' . $stylesheet => 'yes',
'theme_mods_' . $old_theme->get_stylesheet() => 'no',
);
wp_set_option_autoload_values( $theme_mods_options );
/**
* Fires after the theme is switched.
*