php中的基准代码

我有一些php代码

代码中的某些内容（很大一部分代码）导致页面加载时间超过30秒

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有没有一种简单的方法可以找出代码的哪一部分在执行此操作？

如果您使用的是Zend Studio，您可以使用他们的分析器。或使用xdebug进行配置。 否则，您可以在函数调用周围放置计时器以缩小搜索范围

差不多

$startTime = microtime();
... code to execute ...
$timeSpent = microtime() - $startTime;

您还可以使用PECL APD扩展

<?php
apd_set_pprof_trace();

... rest of your code ...

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祝你好运

尝试对xdebug使用分析/跟踪：

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并且

您只需在PHP中按块检查代码的执行时间，如下所示：

start_time = get_time_now
<execution block 1>
execution_time = get_time_now - start_time

start_time = get_time_now
<execution block 2>
execution_time = get_time_now - start_time

start\u time=get\u time\u now
执行时间=立即获取时间-开始时间
开始时间=立即获取时间
执行时间=立即获取时间-开始时间

因此，每次执行特定的代码块时，它都会在几秒钟内被检查并打印到屏幕上。您需要做的是将计算添加到代码的每一块中，以测试哪一块正在减慢页面速度。我编写了一个示例代码供您参考：

<?php
    $time_start = microtime(true);
    // Execution 1
    usleep(300); // say it sleeps for a while, like executing something
    $time = microtime(true) - $time_start;
    echo "Execution 1 is done in $time seconds \n";

    $time_start = microtime(true);
    // Execution 2
    usleep(300); // say it sleeps for a while, like executing something
    $time = microtime(true) - $time_start;
    echo "Execution 2 is done in $time seconds \n";

    $time_start = microtime(true);
    // Execution 3
    usleep(3000000); // this gonna slow down your page
    $time = microtime(true) - $time_start;
    echo "Execution 3 is done in $time seconds";
    echo "And it's slowing down your page \n";
?>

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总是有打印语句！您的代码是否在数据库中查询？执行sql聚合函数，如count（）或avg（）？有几种商业和开源工具。建议您搜索“性能评测php”可能重复的
<?php
    $time_start = microtime(true);
    // Execution 1
    usleep(300); // say it sleeps for a while, like executing something
    $time = microtime(true) - $time_start;
    echo "Execution 1 is done in $time seconds \n";

    $time_start = microtime(true);
    // Execution 2
    usleep(300); // say it sleeps for a while, like executing something
    $time = microtime(true) - $time_start;
    echo "Execution 2 is done in $time seconds \n";

    $time_start = microtime(true);
    // Execution 3
    usleep(3000000); // this gonna slow down your page
    $time = microtime(true) - $time_start;
    echo "Execution 3 is done in $time seconds";
    echo "And it's slowing down your page \n";
?>