fix(HLS): Avoid variable substitution if no variables (#5269)

With this change, we improve performance on very large playlists.
shaka-project · Jun 20, 2023 · b549b60 · b549b60
1 parent 41c1ace
commit b549b60
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/hls/hls_parser.js b/lib/hls/hls_parser.js
@@ -2451,6 +2451,9 @@ shaka.hls.HlsParser = class {
    * @private
    */
   variableSubstitution_(uri, variables) {
+    if (!variables.size) {
+      return uri;
+    }
     let newUri = String(uri).replace(/%7B/g, '{').replace(/%7D/g, '}');
 
     const uriVariables = newUri.match(/{\$\w*}/g);