Avoid calling plugin_dir_url a lot (#5915)

src/Domain/Package.php

@@ -27,6 +27,13 @@ class Package {
 	 */
 	private $path;
 
+	/**
+	 * Holds locally the plugin_dir_url to avoid recomputing it.
+	 *
+	 * @var string
+	 */
+	private $plugin_dir_url;
+
 	/**
 	 * Holds the feature gating class instance.
 	 *
@@ -45,6 +52,9 @@ public function __construct( $version, $plugin_path, FeatureGating $feature_gati
 		$this->version        = $version;
 		$this->path           = $plugin_path;
 		$this->feature_gating = $feature_gating;
+
+		// Append index.php so WP does not return the parent directory.
+		$this->plugin_dir_url = plugin_dir_url( $this->path . '/index.php' );
 	}
 
 	/**
@@ -77,8 +87,7 @@ public function get_path( $relative_path = '' ) {
 	 * @return string
 	 */
 	public function get_url( $relative_url = '' ) {
-		// Append index.php so WP does not return the parent directory.
-		return plugin_dir_url( $this->path . '/index.php' ) . $relative_url;
+		return $this->plugin_dir_url . $relative_url;
 	}
 
 	/**