php原生模板引擎性能优化
好久没写博客了,今天来一发。 背景: 基于YAF开发的一个网站,模板引擎使用原生php,同时为了满足需求,自己开发了一个widget的功能,每次调用widget都会引发一次模板渲染。在网站首页会调用同一个widget数十次,在查看xhprof的数据时,发现widget渲染模板
好久没写博客了,今天来一发。
背景:
基于YAF开发的一个网站,模板引擎使用原生php,同时为了满足需求,自己开发了一个widget的功能,每次调用widget都会引发一次模板渲染。在网站首页会调用同一个widget数十次,在查看xhprof的数据时,发现widget渲染模板耗时较多,主要消耗在加载模板文件上,由于同一个widget使用的模板是同一个,所以希望只加载一次模板来提高执行效率。yaf
ab -n1000 -c50的结果是11.31qps(虚拟机性能差)性能
思路:
首先想到的是在include文件之前把文件读入内存,放到一个静态变量中,之后再调用时就直接从静态变量中取即可。但问题是把模板文件放到变量中之后,怎么渲染呢?最简单粗暴的办法是使用eval,但是太粗暴了,不想使用。
性能
然后想起来php有一个wrapper的功能,可以注册一个wrapper,比如mem,同样是把模板文件读入内存,然后就可以通过include(‘mem://模板引擎路径’)的方式来加载,大致代码如下:http://leo108.com/pid-2015.asp
class Ext_Wrapper { //存放模板文件内容的静态成员变量 protected static $_fileArr = array(); protected $_pos; protected $_curFile; public function stream_open($path, $mode, $options, &$opened_path) { $path = substr($path, 5, strlen($path) - 5); //判断模板文件是否已经在变量中,不存在就读取 if (!isset(self::$_fileArr[$path])) { self::$_fileArr[$path] = file_get_contents($path); } $this->_curFile = $path; $this->_pos = 0; return true; } public function stream_read($count) { //直接从静态变量中读数据 $content = self::$_fileArr[$this->_curFile]; $ret = substr($content, $this->_pos, $count); $this->_pos += strlen($ret); return $ret; } //其他方法略 } //注册wrapper stream_register_wrapper('mem', 'Ext_Wrapper');
ab -n1000 -c50的结果是12.68qps
php原生模板引擎性能优化
最后试了一下eval的性能,大致代码如下:
yaf
class Ext_View extends Yaf_View_Simple { private $tmpPath; private $tmpData = array(); private $include; //用于保存模板内容的静态变量 protected static $_fileArr = array(); public function display($tplFile, $data = array()) { $this->tmpPath = $this->getScriptPath() . '/' . $tplFile; if (is_array($data)) { $this->tmpData = array_merge($this->tmpData, $data); } unset($tplFile); unset($data); extract($this->tmpData, EXTR_OVERWRITE); //判断模板文件是否已经在变量中,不存在就读取 if (!isset(self::$_fileArr[$this->tmpPath])) { self::$_fileArr[$this->tmpPath] = file_get_contents($this->tmpPath); } eval('?>'.self::$_fileArr[$this->tmpPath]); } //其他代码略 }
ab -n1000 -c50的结果是15.07qps,吓尿了,eval果真是简单粗暴有效http://leo108.com/pid-2015.asp

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