php数据性能小测-tutorial php-php.cn

php数据性能小测

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Lepaskan： 2016-06-23 13:58:19

asal

1150 orang telah melayarinya

今天看到一个同事写的php程序突然想测试一下php的两种数组定义方式的性能差别

简单测试代码如下：

1.使用array关键字

<?phpset_time_limit( 120 );echo time();for( $i = 0; $i < 10000000; ++$i ){ $arr = array( 'a' => 0, 'b' => 1, 'c' => 2, 'd' => 3, 'e' => 4, 'f' => 5, 'g' => 6, 'h' => 7, 'i' => 8, 'j' => 9, 'k' => 10, 'l' => 11, 'm' => 12, 'n' => 13, 'o' => 14, 'p' => 15, 'q' => 16, 'r' => 17, 's' => 18, 't' => 19, 'u' => 20, 'v' => 21, 'w' => 22, 'x' => 23, 'y' => 24, 'z' => 25, 'a1' => 0, 'b1' => 1, 'c1' => 2, 'd1' => 3, 'e1' => 4, 'f1' => 5, 'g1' => 6, 'h1' => 7, 'i1' => 8, 'j1' => 9, 'k1' => 10, 'l1' => 11, 'm1' => 12, 'n1' => 13, 'o1' => 14, 'p1' => 15, 'q1' => 16, 'r1' => 17, 's1' => 18, 't1' => 19, 'u1' => 20, 'v1' => 21, 'w1' => 22, 'x1' => 23, 'y1' => 24, 'z1' => 25 );}echo '<br>';echo time();exit();

Salin selepas log masuk

执行时间：1398407484 - 1398407432 = 52s

2.不使用array关键字

<?phpset_time_limit( 120 );echo time();for( $i = 0; $i < 10000000; ++ $i ){ $arr2 ['a'] = 0; $arr2 ['b'] = 1; $arr2 ['c'] = 2; $arr2 ['d'] = 3; $arr2 ['e'] = 4; $arr2 ['f'] = 5; $arr2 ['g'] = 6; $arr2 ['h'] = 7; $arr2 ['i'] = 8; $arr2 ['j'] = 9; $arr2 ['k'] = 10; $arr2 ['l'] = 11; $arr2 ['m'] = 12; $arr2 ['n'] = 13; $arr2 ['o'] = 14; $arr2 ['p'] = 15; $arr2 ['q'] = 16; $arr2 ['r'] = 17; $arr2 ['s'] = 18; $arr2 ['t'] = 19; $arr2 ['u'] = 20; $arr2 ['v'] = 21; $arr2 ['w'] = 22; $arr2 ['x'] = 23; $arr2 ['y'] = 24; $arr2 ['z'] = 25; $arr2 ['a1'] = 0; $arr2 ['b2'] = 1; $arr2 ['c2'] = 2; $arr2 ['d2'] = 3; $arr2 ['e2'] = 4; $arr2 ['f2'] = 5; $arr2 ['g2'] = 6; $arr2 ['h2'] = 7; $arr2 ['i2'] = 8; $arr2 ['j2'] = 9; $arr2 ['k2'] = 10; $arr2 ['l2'] = 11; $arr2 ['m2'] = 12; $arr2 ['n2'] = 13; $arr2 ['o2'] = 14; $arr2 ['p2'] = 15; $arr2 ['q2'] = 16; $arr2 ['r2'] = 17; $arr2 ['s2'] = 18; $arr2 ['t2'] = 19; $arr2 ['u2'] = 20; $arr2 ['v2'] = 21; $arr2 ['w2'] = 22; $arr2 ['x2'] = 23; $arr2 ['y2'] = 24; $arr2 ['z2'] = 25;}echo '<br>';echo time();exit();