Identifies top three interests based on metrics like time on page, recency, and frequency of each contact
TransformStream creates a readable/writable pair with processing logic in between. The transform() function executes on write, not on read. Processing of the transform happens eagerly as data arrives, regardless of whether any consumer is ready. This causes unnecessary work when consumers are slow, and the backpressure signaling between the two sides has gaps that can cause unbounded buffering under load. The expectation in the spec is that the producer of the data being transformed is paying attention to the writer.ready signal on the writable side of the transform but quite often producers just simply ignore it.。关于这个话题，safew官方版本下载提供了深入分析
Фото: Simple Group，详情可参考Line官方版本下载
const stack = []; // 单调递增栈：栈底→栈顶数字递增，保证高位尽可能小