PHP5.X主要版本性能比对测试
下图展示的是 PHP 不同版本的性能测试，用的是 bench.php 这个测试脚本（这个脚本从 PHP 5.1 开始就有了）。纵坐标是完成测试的时间，所以数字越小，成绩越好。
测试的大致步骤：
- 获取从 PHP 5.1 到 5.4 各个版本最新的代码
- 使用最基本的默认配置进行编译，不加任何扩展
- 运行 bench.php 10遍并收集数据
- 取平均值，并且使用 Google Chart 展示
原始数据如下：
所以你可以看到的是，PHP 5.4 比之前的版本有明显的性能提升，还不升级吗？
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