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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                新增聯合類型(Union Types); 添加了 WeakMap; 添加了 ValueError 類; 新增的特性大多是語法糖,主要是JIT。 ? JIT是一種編譯器策略,它將代碼表述為一種中間狀態,在運行時將其轉換為依賴于體系結構的機器碼,并即時執行,在PHP8中,Zend VM不需要解釋某些操作碼,并且這些指令將直接作為CPU級指令執行。 ? **IT和opcache區別** ? 要說明opcode cache與JIT的區別,得先明白,**字節碼,又叫中間碼與機器碼的區別。** ? 簡答的說,提升php執行效率,更快了。 ? JIT參考\[鳥哥博客\](https://www.laruence.com/2020/06/27/5963.html)
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