Finding these optimization opportunities can itself be a significant undertaking. It requires end-to-end understanding of the spec to identify which behaviors are observable and which can safely be elided. Even then, whether a given optimization is actually spec-compliant is often unclear. Implementers must make judgment calls about which semantics they can relax without breaking compatibility. This puts enormous pressure on runtime teams to become spec experts just to achieve acceptable performance.
绝对贫困历史性消除，为什么要设立5年过渡期？
。关于这个话题，WPS下载最新地址提供了深入分析
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Что думаешь? Оцени!，这一点在谷歌浏览器【最新下载地址】中也有详细论述