PHP performance testing tool xhprof practical case analysis

This time I will bring you a practical case analysis of the PHP performance testing tool xhprof. What are the precautions for the practical case analysis of the PHP performance testing tool xhprof. The following is a practical case, let's take a look.

xhprof Overview:

XHProf is a layered PHP performance analysis tool. It reports the number of requests and various metrics at the function level, including blocking time, CPU time, and memory usage. A function's overhead can be broken down into caller and callee overhead, the XHProf data collection phase, which records call count tracking and inclusive metric arcs in a dynamic callgraph of a program. Its unique reporting/post-processing stage of data calculation. During data collection, XHProfd handles recursive function calls by detecting loops and avoids infinite loops by giving each deep call in the recursive call a useful name. XHProf analysis report helps to understand the structure of the executed code, it has a simple HTML user interface (written in PHP). The browser-based performance analysis user interface makes it easier to view or share results with peers. Call graphs can also be drawn.

Installation and use:

I recently wanted to compare the performance of the website, so I found a performance testing job to play with. There are many tools. , but compared to before, I still feel that the installation and use of xhprof is relatively simple, and the data analysis is also OK. Let’s talk about its installation and use. . .

Compile and install xhprof

cd xhprof-0.9.4/xhprof-0.9.4/extension/
phpize
./configure
make
sudo make install

Add the generated xhprof.so file to the php.ini file, and then restart apache

...
#这里要使用相对路径加载的话首先要看一下extension_dir配置的路径，或者直接写上`.so`文件的绝对能够路径即可。。。
extension=xhprof.so
...
sudo apachectl restart
##测试扩展是否安装成功，有如下输出则ok
php --ri xhprof
...
 xhprof
 xhprof => 0.9.2
 CPU num => 4
...

Install graphviz

cd graphviz-2.38.0/
#后面参数是要确保安装了libphp才行哦【没安装的 brew install linpng 就可】
./configure --with-png=yes
make
sudo make install

Test it

Downloaded before In the xhprof folder, find the three folders xhprof_html, xhprof_lib, and sample. Then put these three folders where you can access them, and then access the following http://xxxx/sample/sample.php through the connection. When you visit the following http://xxxx/xhprof_html/, you will see a record. After clicking it, you can see the analysis results page. Click View Full CallGraph to link to the graphical report page.

How to use

Suppose you want to look at the home page performance data of a website you made, then you have to find the performance data of this website Home pageEntry file, add the xhprof performance test code before and after the core file is loaded

#开启，具体参数说明可以查看官方文档
xhprof_enable(XHPROF_FLAGS_NO_BUILTINS | XHPROF_FLAGS_CPU | XHPROF_FLAGS_MEMORY);
#核心文件的执行
...
require 'index.php'
...
#关闭
$xhprof_data = xhprof_disable();
#这里的路径根据自己的站点来配置
$XHPROF_ROOT = realpath(dirname(FILE) .'/');
include_once $XHPROF_ROOT . "/xhprof_lib/utils/xhprof_lib.php";
include_once $XHPROF_ROOT . "/xhprof_lib/utils/xhprof_runs.php";
$xhprof_runs = new XHProfRuns_Default();
$run_id = $xhprof_runs->save_run($xhprof_data, "xhprof");
#这里打印出本次测试的id，方便到报表列表页面【http://xxxx/xhprof_html/】去通过对应的id找到对应的结果
var_dump($run_id);

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to php Chinese Other related articles online!

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