For implementers, this promise-heavy design constrains optimization opportunities. The spec mandates specific promise resolution ordering, making it difficult to batch operations or skip unnecessary async boundaries without risking subtle compliance failures. There are many hidden internal optimizations that implementers do make but these can be complicated and difficult to get right.
stack2.pop(); // 弹出无效的候选值
，这一点在夫子中也有详细论述
byobRequest.respond(bytesToWrite);
pixels network allow mybox api.example.com