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.
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renderer.setSize(viewContainer.clientWidth, viewContainer.clientHeight);，这一点在搜狗输入法2026中也有详细论述
* Code should be simple and clean, never over-complicate things.