perf(desktop): enable the V8 code cache for the renderer scheme

Chromium only persists compiled bytecode for schemes that opt in, so every launch re-parsed and re-compiled the whole renderer bundle. With the codeCache privilege on oc:// the third launch onwards loads from the Code Cache directory. Packaged build, warm service, renderer main-thread task time until idle 481 -> 447 ms (script 110 -> 83 ms); shell visible 450 -> 405 ms after the renderer process starts.
2026-09-18 23:06:25 +00:00 · 2026-09-18 23:00:28 +10:00
1 changed files with 2 additions and 0 deletions
@@ -17,6 +17,8 @@ protocol.registerSchemesAsPrivileged([
      standard: true,
      supportFetchAPI: true,
      stream: true,
+      // Let Chromium keep V8 bytecode for the renderer bundle between launches.
+      codeCache: true,
    },
  },
 ])