Q:基于什么样的理由 PHP 比其它 CGI 好呢?有没有比较具体的数据可以证明 PHP 执行与其它 CGI 执行的效率好 ? 现在我的公司是用 C 来写 CGI 的，如果换成 PHP，会不会比较好呢 ?没有强而有力的依据的话，我就没办法说服上面的人让我转成 PHP 了... A: 我认为"好" 要有三点 第一: 写出来的程式的执行速度快. 第二: 遇到有大量存取时的执行效能强. 第三: 程式开发的时间快，易维护。 php在这三点中，虽都不一定是最好的，但也都在前茅 以下是C,PHP和Perl在速度方面的比较 我用下面的算式测试 $s=1.0; for ($i=1;$i 然后用ab -n 10000 -c 20 http://mycgi 测试，结果 C语言用了 37.511 秒 PHP3用了 45.393 秒 PERL用了 68.418 秒 看起是C 最快没错，不过，和PHP3的结果没有太大 的差距。 Perl最慢 以下为测试数据 ============================================== C 语言 ============================================== Document Path: /~evan/test/gcc.cgi Document Length: 19 bytes Concurrency Level: 20 Time taken for tests: 37.511 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 1750000 bytes HTML transferred: 190000 bytes Requests per second: 266.59 Transfer rate: 46.65 kb/s received Connnection Times (ms) min avg max Connect: 0 30 3001 Processing: 4 40 69 Total: 4 70 3070 PHP3 ============================================== Document Path: /~evan/test/php3.php3 Document Length: 15 bytes Concurrency Level: 20 Time taken for tests: 45.393 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 1710000 bytes HTML transferred: 150000 bytes Requests per second: 220.30 Transfer rate: 37.67 kb/s received Connnection Times (ms) min avg max Connect: 0 34 3039 Processing: 6 53 183 Total: 6 87 3222 PERL ============================================== Document Path: /~evan/test/perl.cgi Document Length: 17 bytes Concurrency Level: 20 Time taken for tests: 68.418 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 1730173 bytes HTML transferred: 170017 bytes Requests per second: 146.16 Transfer rate: 25.29 kb/s received Connnection Times (ms) min avg max Connect: 0 22 3005 Processing: 9 112 323 Total: 9 134 3328
