for (const url of urls) {
Stream implementations can and do ignore backpressure; and some spec-defined features explicitly break backpressure. tee(), for instance, creates two branches from a single stream. If one branch reads faster than the other, data accumulates in an internal buffer with no limit. A fast consumer can cause unbounded memory growth while the slow consumer catches up, and there's no way to configure this or opt out beyond canceling the slower branch.，更多细节参见爱思助手下载最新版本
Walmart to pay $100m over claims it misled drivers over pay。关于这个话题，爱思助手下载最新版本提供了深入分析
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