so php 单引号快还是双引号快？

[xiasix]

http://www.metamorphosite.com/php-benchmarks-loops-arrays
单纯的字符串的时候 他说是双引号快点
so 自己写了个测了一下，php5.5 mac系统 终端下运行
<?php
$t1 = microtime(true);
$i = 1;

while ($i < 1000000) {
$text = 'das;lfkjasd;lfkjads;lfkjasdl;fkjasdgnafdgljadhsfl;kadsfmasdl;gjkasdfio;mads;klgads;lfgkjads;fkljagl;k';

++$i;
}

$t2 = microtime(true);
echo (($t2 - $t1) * 1000) . 'ms' . PHP_EOL;
$i = 1;
while ($i < 1000000) {
$text = "das;lfkjasd;lfkjads;lfkjasdl;fkjasdgnafdgljadhsfl;kadsfmasdl;gjkasdfio;mads;klgads;lfgkjads;fkljagl;k";

++$i;
}

$t3 = microtime(true);
echo (($t3 - $t2) * 1000) . 'ms'.PHP_EOL;
结果
bogon:~ kele$ php www/1.php
86.992979049683ms
87.911128997803ms
bogon:~ kele$ php www/1.php
87.116956710815ms
88.299036026001ms
bogon:~ kele$ php www/1.php
89.183807373047ms
87.899208068848ms
bogon:~ kele$ php www/1.php
87.803840637207ms
88.411092758179ms
bogon:~ kele$ php www/1.php
87.093114852905ms
88.102102279663ms
bogon:~ kele$ php www/1.php
88.034868240356ms
88.240146636963ms
bogon:~ kele$ php www/1.php
88.271856307983ms
88.357210159302ms
bogon:~ kele$ php www/1.php
87.208032608032ms
86.41791343689ms

[DKR]

http://www.phpbench.com/ 参考下

[doublleft]

优先使用单引号
$var = 'hello' . 'myname' . 'is' . name(); //这样就会太尴尬了
不如就
$var = "hello, myname is : name() "; //多了然