* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
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.
，这一点在搜狗输入法下载中也有详细论述
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She was also a prominent advocate for the legalisation of same-sex marriage in Australia.
坚持创新驱动 充分释放要素效能