PHP 性能分析工具XHProf使用

$ wget https://github.com/非死book/xhprof/tarball/master -O xhprof.tar.gz
$ tar zxf xhprof.tar.gz
$ cd 非死book-xhprof-b8c76ac/extension/
# phpize
# ./configure --with-php-config=`/path/to/php-config`
# make && make install
# make test


# vi /etc/php.d/xhprof.ini
; 內容為：
extension = xhprof.so
; 注意：output_dir 必須存在且可寫
xhprof.output_dir = /tmp/xhpro


然后重啟apache服務
# service php-fpm restart 或 service httpd restart 

2、使用XHProf

// start profiling
xhprof_enable();

// run program
....

// stop profiler
$xhprof_data = xhprof_disable();

//
// Saving the XHProf run
// using the default implementation of iXHProfRuns.
//
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();

// Save the run under a namespace "xhprof_foo".
//
// **NOTE**:
// By default save_run() will automatically generate a unique
// run id for you. [You can override that behavior by passing
// a run id (optional arg) to the save_run() method instead.]
//
$run_id = $xhprof_runs->save_run($xhprof_data, "xhprof_foo");

echo "---------------\n".
"Assuming you have set up the http based UI for \n".
"XHProf at some address, you can view run at \n".
"http://<xhprof-ui-address>/index.php?run=$run_id&source=xhprof_foo\n".
"---------------\n";

如此一來，會在上面設定的xhprof.output_dir目錄里生成名字類似49bafaa3a3f66.xhprof_foo的數據文件，可以很方便的通過Web方式瀏覽效果：

3、展示輸出結果

在 xhprof 源碼包中提供了xhprof_html 和 xhprof_lib 兩個文件夾，xhprof_lib是用于 PHP 開發，而xhprof_html用于顯示 xhprof 分析結果的 web 界面,訪問形式如下

http://<xhprof-ui-address>/index.php?run=49bafaa3a3f66&source=xhprof_foo

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