Function markFirstMessageRender

web/lib/performance/metrics.ts:123–127

()

/** Call when the first message bubble finishes rendering. */
export function markFirstMessageRender(): void {
  if (typeof performance === "undefined") return;
  const value = performance.now();
  report({ name: "first_message_render", value });
}

/**
 * Measures streaming token latency: time from when the server sends the