The entire pipeline executes in a single call stack. No promises are created, no microtask queue scheduling occurs, and no GC pressure from short-lived async machinery. For CPU-bound workloads like parsing, compression, or transformation of in-memory data, this can be significantly faster than the equivalent Web streams code – which would force async boundaries even when every component is synchronous.
The First Counter-Attack
，更多细节参见旺商聊官方下载
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The hidden cost of promises。关于这个话题，heLLoword翻译官方下载提供了深入分析