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背景:
思路:
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php原生模板引擎性能优化

Jun 06, 2016 pm 08:13 PM
php optimization blog Native engine performance template

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');
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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
}
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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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