From 07e6dc15298a03b910ee29af44870eee83856e7f Mon Sep 17 00:00:00 2001
From: Weston Ruter <weston@xwp.co>
Date: Fri, 6 Mar 2026 18:03:36 +0000
Subject: [PATCH] REST API: Optimize themes collection response when querying
 active theme.

This updates `WP_REST_Themes_Controller::get_items()` to shortcut returning the current theme when the request explicitly queries for the active theme, avoiding expensive call to `wp_get_themes()`.

Developed in https://github.com/WordPress/wordpress-develop/pull/11032

Follow up to r49925.

Props aduth, mukesh27, westonruter.
See #50152.
Fixes #64719.

Built from https://develop.svn.wordpress.org/trunk@61856


git-svn-id: http://core.svn.wordpress.org/trunk@61143 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 .../class-wp-rest-themes-controller.php       | 20 +++++++++++--------
 wp-includes/version.php                       |  2 +-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php
index 94b3e5c264..472e8dc12c 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php
@@ -197,18 +197,22 @@ class WP_REST_Themes_Controller extends WP_REST_Controller {
 	public function get_items( $request ) {
 		$themes = array();
 
-		$active_themes = wp_get_themes();
 		$current_theme = wp_get_theme();
 		$status        = $request['status'];
 
-		foreach ( $active_themes as $theme ) {
-			$theme_status = ( $this->is_same_theme( $theme, $current_theme ) ) ? 'active' : 'inactive';
-			if ( is_array( $status ) && ! in_array( $theme_status, $status, true ) ) {
-				continue;
-			}
-
-			$prepared = $this->prepare_item_for_response( $theme, $request );
+		if ( array( 'active' ) === $status ) {
+			$prepared = $this->prepare_item_for_response( $current_theme, $request );
 			$themes[] = $this->prepare_response_for_collection( $prepared );
+		} else {
+			foreach ( wp_get_themes() as $theme ) {
+				$theme_status = ( $this->is_same_theme( $theme, $current_theme ) ) ? 'active' : 'inactive';
+				if ( is_array( $status ) && ! in_array( $theme_status, $status, true ) ) {
+					continue;
+				}
+
+				$prepared = $this->prepare_item_for_response( $theme, $request );
+				$themes[] = $this->prepare_response_for_collection( $prepared );
+			}
 		}
 
 		$response = rest_ensure_response( $themes );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 50b07fe05b..a9fc3cf5d6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.0-beta3-61855';
+$wp_version = '7.0-beta3-61856';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.