PHP 4到今年年底PHP Group将不再对其进行支持了,所以为了让大家更有信心的转移到PHP 5平台上,我特别做了这个测试,看看我们PHP 4.x 是否真的性能比我们的PHP 5.x要好捏,测试结果很明显,那就是PHP 5.x 比php 4.x不论是面向对象还是面向过程,都要比PHP 4.x 要快,所以大家完全有必要转移到PHP 5.x 平台上,去体验PHP 5.x 平台的各种功能和性能。
因为PHP 5 包括新的对象模型,更多新特点,更快的处理速度,特别是处理面向对象代码的速度,虽然在php 4中面向对象代码的速度比较一般,但是在PHP5.x中面向对象代码的速度都超过了面向过程的速度,所以不要对面向对象的性能持有怀疑,下面的测试结果将说明这一切。
【测试环境】
* CPU: Intel Pentium4 2.66GHz
* Memory: 1GB
* Disk: 73GB/SCSI
* OS: FreeBSD 4.11
* Web: Apache 1.3.37
测试工具:ab (也可以选用http_load)
名词RPS: Requests per second (每秒的请求数量)
【PHP 4.4.2 测试结果】
[ 函数 Function ]
测试结果:ab -n 10000 -c 50 的结果是1047.23/rps
[ 类 Class ]
不实例化类
测试结果:ab -n 10000 -c 50 的结果是 1034.98/rps
实例化类
测试结果:ab -n 10000 -c 50 的结果是 1006.14/rps
类的继承
测试结果:ab -n 10000 -c 50 的结果是 992.95/rps
【PHP 5.2.1测试结果】
[ 函数 Function ]
测试结果:ab -n 10000 -c 50 的结果是 1176.06/rps
[ 类 Class ]
不实例化类
测试结果:ab -n 10000 -c 50 的结果是 1197.17/rps
实例化类
测试结果:ab -n 10000 -c 50 的结果是 1187.93/rps
类的继承和抽象
测试结果:ab -n 10000 -c 50 的结果是 1128.54/rps
【测试结果和分析】
[ 测试结果数据 ]
版本 函数测试 不实例化类 实例化类 类的继ā承
PHP 4.4.2 1047.23/rps 1034.98/rps 1006.14/rps 992.95/rps
PHP 5.2.1 1176.06/rps 1197.17/rps 1187.93/rps 1128.54/rps
[ 结果分析 ]
1. 总体来说,可以明显刚看到PHP5.2 的性能要比 PHP4.4略高一点,所以不要怀疑PHP5.2的性能会差,明显比 PHP4要快
2. PHP4.4中的类的解析性能明显要比函数的要慢,特别是当使用了继承以后,更是下降的厉害,所以在PHP4.4中更适宜使用面向过程和没有继承的类操作
3. PHP5.2中结果是类的执行速度比函数还要快,可以看出PHP5.2的引擎对面向对象处理花费了很大的功夫,同时他们不论是函数还是类,性能都不错
4. 通过这个测试,我们完全有理由在代码变更不大的情况下,把PHP4升级到PHP5,而且PHP5基本向下兼容PHP4的代码,除了一些特殊的代码。另外上面提到今年年底之后PHP Group将不再继续对PHP4进行维护了,所以早升级,早安心。

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