perf(WebVTT): Improve parsing time for unstyled payloads (#6066)

Related to #6065
shaka-project · Jan 11, 2024 · e32c4bb · e32c4bb
1 parent 2c4b000
commit e32c4bb
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/lib/text/vtt_text_parser.js b/lib/text/vtt_text_parser.js
@@ -451,6 +451,11 @@ shaka.text.VttTextParser = class {
    */
   static parseCueStyles(payload, rootCue, styles) {
     const VttTextParser = shaka.text.VttTextParser;
+    // Optimization for unstyled payloads.
+    if (!payload.includes('<')) {
+      rootCue.payload = VttTextParser.htmlUnescape_(payload);
+      return;
+    }
     if (styles.size === 0) {
       VttTextParser.addDefaultTextColor_(styles);
     }