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大家都說SplFixedArray is faster than array()但是......SplFixedArray似乎比陣列()慢
<?php
$max_el = 256;
$a = array();
$c = new SplFixedArray($max_el);
for ($i = 0; $i < $max_el; $i++) {
$a[$i] = $c[$i] = mt_rand(0, 1000);
}
$start = microtime(true);
for ($j = 0; $j < 100000; $j++) {
for ($i = 0; $i < $max_el; $i++) {
$x = $a[$i];
}
}
$elapsed0 = microtime(true) - $start;
$start = microtime(true);
for ($j = 0; $j < 100000; $j++) {
for ($i = 0; $i < $max_el; $i++) {
$x = $c[$i];
}
}
$elapsed2 = microtime(true) - $start;
echo "Elapsed time: $elapsed0\r\n";
echo "Elapsed time: $elapsed2";
,它的輸出如下:
Elapsed time: 1.3631780147552
Elapsed time: 2.0408799648285
因此,與256個元素陣列()似乎更快。
這裏是我的結果與1024個元素:
Elapsed time: 5.6066889762878
Elapsed time: 7.7747831344604
另一個勝利數組()。
隨着10個* 1024個元素:
Elapsed time: 57.000520944595
Elapsed time: 88.719652891159
道具,再次,對陣列()。
確切地說,當SplFixedArray()應該更快?