<ruby id="bdb3f"></ruby>

    <p id="bdb3f"><cite id="bdb3f"></cite></p>

      <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
        <p id="bdb3f"><cite id="bdb3f"></cite></p>

          <pre id="bdb3f"></pre>
          <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

          <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
          <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

          <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                <ruby id="bdb3f"></ruby>

                > **一.查看JIT編譯原理圖** > ![](https://img.kancloud.cn/40/a2/40a25addf99f4eb2a644a9d9fb6e6680_1024x679.png) **二.Zend Opcache作用** 1.檢查opcodes是否緩存 2.zend compiler編譯器進行編譯生成opcodes 3.optimizer優化器生成優化后的opcodes 4.把優化后的opcodes放入opcodes cache緩存 5.經過zend vm虛擬機生成opcodes handlers處理程序 6.送入x86 cpu架構進行執行 **三.JIT編譯原理** 1.檢查opcodes是否緩存 2.zend compiler編譯器進行編譯生成opcodes 3.optimizer優化器生成優化后的opcodes 4.把優化后的opcodes放入opcodes cache緩存 5.jit編譯器把optimized opcodes再次編譯成匯編機器碼machine codes 6.進入zend vm虛擬前先檢查是否開啟jit引擎 7.如果已經開啟了jit引擎則直接讀取機器碼中的jit buffer代碼片段 8.送入x86 cpu架構進行執行 **四.Opcache示意圖的關鍵點** 1.Opcache會做opcode層面的優化,比如圖中的倆條opcode合并為一條 2.PHP8的JIT目前是在Opcache之中提供的 3.JIT在Opcache優化之后的基礎上,結合Runtime的信息再次優化,直接生成機器碼 4.JIT不是原來Opcache優化的替代,是增強 5.目前PHP8只支持x86架構的CPU
                  <ruby id="bdb3f"></ruby>

                  <p id="bdb3f"><cite id="bdb3f"></cite></p>

                    <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
                      <p id="bdb3f"><cite id="bdb3f"></cite></p>

                        <pre id="bdb3f"></pre>
                        <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

                        <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
                        <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

                        <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                              <ruby id="bdb3f"></ruby>

                              哎呀哎呀视频在线观看