Installation and use of XHProf (PHP performance testing artifact)

XHProf是Facebook开发的性能调试工具，帮助我们的PHP程序性能调优，更加健壮。XHProf安装和使用方法将在本章讲解。XHProf是PHP的PECL扩展。没有XDeBug那些耗费资源，更加的小巧。 流程：程序开头打点，结尾打点。那么XHProf机会记录在两个点之间的所有代码响应时所耗费的时间、内存、CPU等各项指标，我们也可以知道一次请求调用了多少次MySQL，多少次Memcache，更加直观的指明优化道路。 安装： <precourier new white-space:pre-wrap padding:9.5px margin-top:0px margin-bottom:10px line-height:1.42857 word-break:break-all word-wrap:break-word border:1px solid rgb background-color:rgb>------------下载并编译PHP-XHProf源码------------ wget http://pecl.php.net/get/xhprof-0.9.4.tgz tar -zxvf xhprof-0.9.4.tgz cd xhprof-0.9.4 cd extension phpize ./configure --enable-xhprof make make test sudo make install ------------修改php.ini--------------- sudo vim /etc/php.ini #在php.ini最下方加入以下： extension=xhprof.so xhprof.output_dir="/var/www/xhprof" -----------重启Apache-------------- sudo apache restart Enter the installation package folder you just decompressed, and copy xhprof_lib and xhprof_html to the project directory. Next, create a header file head.php, which is the beginning of the two dots: <precourier new white-space:pre-wrap padding:9.5px margin-top:0px margin-bottom:10px line-height:1.42857 word-break:break-all word-wrap:break-word border:1px solid rgb background-color:rgb>//head.php <?php if(extension_loaded('xhprof')){ //载入下载的XHPROF包中的2个文件夹 include_once 'xhprof_lib/utils/xhprof_lib.php'; include_once 'xhprof_lib/utils/xhprof_runs.php'; xhprof_enable(XHPROF_FLAGS_CPU &#43; XHPROF_FLAGS_MEMORY); } . Then create a bottom file foot.php, which is the last of the two dots: //foot.php <?php if(extension_loaded('xhprof')){ $ns = 'myXhprof'; //关闭profiler $xhprofData = xhprof_disable(); //实例化类 $xhprofRuns = new XHProfRuns_Default(); $runId = $xhprofRuns->save_run($xhprofData, $ns); //前端展示库的URL $url = 'http://localhost/xhprof_html/index.php'; $url .= '?run=%s&source=%s'; //变量替换 $url = sprintf($url, $runId, $ns); //输入URL echo '<a href="'.%24url.'" target="_blank">查看结果</a>'; } . The last step: dotting. Now we create a test file index.php. Test my big Hello World. <precourier new white-space:pre-wrap padding:9.5px margin-top:0px margin-bottom:10px line-height:1.42857 word-break:break-all word-wrap:break-word border:1px solid rgb background-color:rgb>//index.php <?php include_once 'head.php'; echo 'Hello World'; include_once 'foot.php'; You can see that in http://localhost/index.php, the bottom is the "View Results" we wrote in foot.php. Click in and you can see a list of all functions used in this request. , the time, CPU, Memory and other information consumed by each function can be sorted according to the selection by clicking on the first column. Click [View Full Callgraph] to see the flow chart generated by this list. From the entry point to which function, to which function, which function this function calls, how many times this function calls Memcache, etc., it is clear. Reduce MC calls, reduce this, reduce that, can the response speed of requests be faster? Tip: I have 1,000 files. Now I need to use XHProf to check my entire project. Do I need to add include at the beginning and end of each file? Add: auto_prepend_file = /var/www/head.php auto_append_file = /var/www/foot.php in php.ini or add php_value auto_prepend_file = /var/www/head.php php_value auto_append_file = /var/www/foot.php in .htaccess. Error: 1. When clicking [View Full Callgraph] to view the picture, an error is reported: failed to execute cmd: "dot -Tpng". stderr: `sh: dot: command not found`. Reason: Reason: The graphical tool is not installed Solution: //红帽系列 yum install graphviz //Ununtu apt-get install graphviz //OS X brew install graphviz

The above introduces the installation and use of XHProf (PHP performance testing artifact), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.