性能测评：Ngix_Lua, Node.JS Python三者性能相当，均比php快近一倍
之前我们介绍过: 性能测评：Node.JS比Java EE快20% , 下面我们来比较一下其他几种脚本语言php, lua, python 和 node.js之间的性能：
1. ngx_lua nodejs php 比较
我在研究一阵子ngx_lua之后发现lua语法和js真的很像，同时ngx_lua模型也是单线程的异步的事件驱动的，工作原理和nodejs相同，代码甚至比nodejs的异步回调更好写一些。
性能测试，100并发php:17400nodejs:31197ngx_lua:32628
单纯做http代理服务器加上一些简单的逻辑，似乎ngx_lua的方案更加合适。 引自： PHP vs Node.js vs Nginx-Lua
以下是从占用的资源上来分析:
出自： php node lua 由图中可以看出:
nodejs占用CPU比lua高一些，
nodejs与ngx_lua二者占用内存不变(在处理同一业务逻辑时)，php占用内存不稳定（可能跟多线程有关，连接数越多，内存占用越多）
下面猿友对ngix_lua的一些看法：
xueyangkk
其实这样考虑是对的 ！ ngx_lua是基于nginx的扩展 nginx已经有无数家验证过 他确实是个可靠的WEB应用。而且ngx_lua 已经有很多广泛的应用 可以说技术上来说已经很成熟了，你们的平台是一个OPANAPI的应用 。所以 在这个上 选ngx_lua 是对的 ！当然这并不是说NODE不好 ！语言没什么好坏 ！只能从成本 技术成熟度来考虑 ！
jayceefun
之前使用过章大神openresty, 确实很值得一试, 比node.js易用, 没有那么裸, 做的各种性能优化也都是c级别的, 刚出时也是号称并发超过node.js的. lua确实是很快, 据说是脚本语言里最快的了. 不过也有缺点就是lua的文件处理很弱, 各种库非常的少, 记得当初的想要个好点的orm都没有, 还得手写. 同意楼主说的lua某种程度上真的是跟js很像啊, 当初转型node.js语言上也基本没费多少劲. 推荐一个用lua完全模仿node.js写的一个东西, 叫luvit, 现在完全不成熟, 只有些简单的http server功能, 但是基础的性能测试结果是比node.js快2倍还是4倍来的, 很恐怖啊有木有.
结论：
并发请求数lua/nodejs相当，均比php快一倍
资源占用上lua最少，nodejs次之，二者对内存并不贪婪，php占用最多且不稳定。
2. nodejs python php 比较
国外某猿友做过一个关于php/nodejs/go/scala/python之间的性能比较： API Programming Language Bake-off
以下测试用例为使用mongodb添加删除数据时，各个语言每秒处理的最大请求数：
由其博文可以看出，在并发线程达到一定程度时go和php写的测试脚本都挂了（go不是号称最快吗？)
另外两位中国猿友的评测，也证明了这一点,
1. 测了一下nodejs和php性能
2. 单服务器node.js和php性能测试
在他们的结论中node.js的并发处理能力均二倍于php.
结论：
在一般情况下lua和node.js的处理能力相当，均2倍于php，甚至lua的性能更好。在并发数达到一定程度时，php可能会挂，可能源于大并发下多线程对内存资源的占用是不可测且不可控的。
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