From 141330a18f7d58702fb474f00ba18f00f930e77d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?A=CC=81lvaro=20Velad=20Galva=CC=81n?= <ladvan91@hotmail.com>
Date: Wed, 10 Jan 2024 09:14:54 +0100
Subject: [PATCH] perf(VTT): Improve parsing time for unstyled payloads

---
 lib/text/vtt_text_parser.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/text/vtt_text_parser.js b/lib/text/vtt_text_parser.js
index 8590d58158..54379b8018 100644
--- 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);
     }