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为什么PHP比其它CGI好?
 
 
修改时间:[2010/07/12 06:54]    阅读次数:[585]    发表者:[起缘]
 
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 ? 现在大发快3的大发快3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,大发快3就没办法说服上面的人让大发快3转成 PHP 了...

 

A:
大发快3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
大发快3用下面的算式测试
$s=1.0;
for ($i=1;$i<=10;$i++) {
for ($j=1;$j<=10;$j++) {
$s=$s*1.0005;
$s=$s/1.0004;
};
};
print $s;
?>
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