△中科第五纪轮式双臂机器人，图片：采访人提供
Performance tracking
，这一点在heLLoword翻译官方下载中也有详细论述
Under load, this creates GC pressure that can devastate throughput. The JavaScript engine spends significant time collecting short-lived objects instead of doing useful work. Latency becomes unpredictable as GC pauses interrupt request handling. I've seen SSR workloads where garbage collection accounts for a substantial portion (up to and beyond 50%) of total CPU time per request. That's time that could be spent actually rendering content.
What TransformStreams are supposed to do is check for backpressure on the controller and use promises to communicate that back to the writer: