Commit 5ed0dea06d for wordpress.org

commit 5ed0dea06d1f05d60d3bf4b04992b88777c3b398
Author: SergeyBiryukov <sergeybiryukov@git.wordpress.org>
Date:   Sat Sep 19 09:39:48 2026 +0000

    Feeds: Hoist option lookups out of `get_the_category_rss()` loop.

    The `get_bloginfo_rss( 'url' )` and `get_option( 'blog_charset' )` values are constant for the duration of the call. Resolving them once before the loop leaves the emitted markup byte-for-byte identical while avoiding the overhead of extra function calls and filter applications. The saving scales with taxonomy-heavy posts and applies to every item in a feed response.

    The values are computed only when there is at least one term to render, so posts with no categories or tags do no extra work.

    Developed in https://github.com/WordPress/wordpress-develop/pull/13576.

    Follow-up to r5548, r10688, r28258, r63757.

    Props mukesh27, westonruter.
    Fixes #66126.
    Built from https://develop.svn.wordpress.org/trunk@63761


    git-svn-id: http://core.svn.wordpress.org/trunk@62933 1a063a9b-81f0-0310-95a4-ce76da25c4cd

diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index 453cc9063c..7f9988b29f 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -406,13 +406,24 @@ function get_the_category_rss( $type = null ) {

 	$cat_names = array_unique( $cat_names );

+	$atom_scheme  = '';
+	$blog_charset = '';
+
+	if ( $cat_names ) {
+		if ( 'atom' === $type ) {
+			$atom_scheme = get_bloginfo_rss( 'url' );
+		} elseif ( 'rdf' !== $type ) {
+			$blog_charset = get_option( 'blog_charset' );
+		}
+	}
+
 	foreach ( $cat_names as $cat_name ) {
 		if ( 'rdf' === $type ) {
 			$the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
 		} elseif ( 'atom' === $type ) {
-			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );
+			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( $atom_scheme ), esc_attr( $cat_name ) );
 		} else {
-			$the_list .= "\t\t<category><![CDATA[" . html_entity_decode( $cat_name, ENT_COMPAT, get_option( 'blog_charset' ) ) . "]]></category>\n";
+			$the_list .= "\t\t<category><![CDATA[" . html_entity_decode( $cat_name, ENT_COMPAT, $blog_charset ) . "]]></category>\n";
 		}
 	}

diff --git a/wp-includes/version.php b/wp-includes/version.php
index beeb1393ae..27b6e60dff 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.2-alpha-63760';
+$wp_version = '7.2-alpha-63761';

 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.