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.
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手法結合線上線下，橫跨中國國內如微博、微信等社群平台，以及300多個「外國」社群媒體平台。該用戶描述，中國境內平台的貼文多達數百萬則，外國平台也有數萬則，大量帳號為假帳號或隸屬行動單位。