我常用在保存數據 主要是開銷比較小

$obj = new stdClass;

$obj->test = 'abc';

$obj->other = 6.2;

$obj->arr = array (1, 2, 3);

比數組更便捷

測試

$size = 200000;

mark();

$sc = new stdClass;

foreach(range(1,5) as $i){

$sc->$i = pow($i,2);

}

mark();

dump('sc',1);

mark();

foreach(range(1,$size) as $i){

$scn = "sc" . $i;

// $$scn = $sc;

$arr_sc[] = $sc;

}

mark();

dump('sc');

mark();

$arr =[];

foreach(range(1,5 ) as $i){

$arr[] = pow($i,2);

}

mark();

dump('arr',1);

mark();

foreach(range(1,$size) as $i){

$arrn = "arr" . $i;

// $$arrn = $arr;

$arr_arr[] = $arr;

}

mark();

dump('arr');

function dump($var,$size = 200000){

global $mem_size,$times,$$var;

// xdebug_debug_zval($var);

echo "Total:" .round(($mem_size[count($mem_size)-1]-$mem_size[count($mem_size)-2])/pow(1024,2),3) . "Mb "

. "Avg:". round(($mem_size[count($mem_size)-1]-$mem_size[count($mem_size)-2])/(1024*$size),3) . "Kb "

. "Time:". round(($times[count($times)-1] -$times[count($times)-2]),3) ."\n";

}

function mark($type=0){

global $mem_size,$times;

$mem_size[] = memory_get_usage();

$times[] = microtime(true);

}

結果

Total:0.002Mb Avg:1.773Kb Time:0

Total:18.785Mb Avg:0.096Kb Time:0.101

Total:0.001Mb Avg:1.227Kb Time:0

Total:18.785Mb Avg:0.096Kb Time:0.1

總結

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