Merge branch 'tz-optimize-emoji-map-creation' into 'master'

Deactivates Emoji Map Creation for Bots + Crawlers

See merge request gitlab-org/gitlab!45016

app/assets/javascripts/emoji/support/index.js

@@ -5,6 +5,14 @@ import getUnicodeSupportMap from './unicode_support_map';
 let browserUnicodeSupportMap;
 
 export default function isEmojiUnicodeSupportedByBrowser(emojiUnicode, unicodeVersion) {
+  // Skipping the map creation for Bots + RSPec
+  if (
+    navigator.userAgent.indexOf('HeadlessChrome') > -1 ||
+    navigator.userAgent.indexOf('Lighthouse') > -1 ||
+    navigator.userAgent.indexOf('Speedindex') > -1
+  ) {
+    return true;
+  }
   browserUnicodeSupportMap = browserUnicodeSupportMap || getUnicodeSupportMap();
   return isEmojiUnicodeSupported(browserUnicodeSupportMap, emojiUnicode, unicodeVersion);
 }