performanceResourceTiming.firstInterimResponseStart

• 类型：<number>

高分辨率毫秒时间戳，表示在 Node.js 接收到第一个过渡响应的第一个字节之后的时间，比如 103 Early Hints 响应。

🌐 The high resolution millisecond timestamp representing the time immediately after Node.js receives the first byte of the first interim response, such as a 103 Early Hints response.