Interactivity API: Do not process directives when there aren’t any.

Short-circuits directive processing when the markup does not actually contain any `data-wp-*` attributes.
This reduces function calls and memory usage for the best case scenario due to not involving `WP_HTML_Tag_Processor`.

Props joemcgill, swissspidy, gziolo, cbravobernal, flixos90.
Fixes #60749.
Built from https://develop.svn.wordpress.org/trunk@57824


git-svn-id: http://core.svn.wordpress.org/trunk@57325 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/interactivity-api/class-wp-interactivity-api.php

@@ -204,6 +204,10 @@ final class WP_Interactivity_API {
 	 * @return string The processed HTML content. It returns the original content when the HTML contains unbalanced tags.
 	 */
 	public function process_directives( string $html ): string {
+		if ( ! str_contains( $html, 'data-wp-' ) ) {
+			return $html;
+		}
+
 		$context_stack   = array();
 		$namespace_stack = array();
 		$result          = $this->process_directives_args( $html, $context_stack, $namespace_stack );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-57822';
+$wp_version = '6.6-alpha-57824';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.