The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.
SplObjectStorage
double(1.3110690116882)
[object_hash => value]
double(2.4147419929504)
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplObjectStorage::offsetGet — Retorna os dados associados a um object
Retorna os dados associados a um object no armazenamento.
Os dados previamente associados ao object no armazenamento.
Lança UnexpectedValueException quando o object não pôde ser encontrado.
Exemplo #1 Exemplo de SplObjectStorage::offsetGet()
<?php
$s = new SplObjectStorage;
$o1 = new stdClass;
$o2 = new stdClass;
$s[$o1] = "hello";
$s->attach($o2);
var_dump($s->offsetGet($o1)); // Similar a $s[$o1]
var_dump($s->offsetGet($o2)); // Similar a $s[$o2]
?>O exemplo acima produzirá algo semelhante a:
string(5) "hello" NULL
The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.
SplObjectStorage
double(1.3110690116882)
[object_hash => value]
double(2.4147419929504)SplObjectStorage::offsetGet() can become EXTREMELY slow depending on the associated data (PHP 5.6).
<?php
// SplObjectStorage
$object = new stdClass;
$test = new SplObjectStorage;
$test->attach($object, str_repeat("\0", 1024*1024));
$start = microtime(true);
for ($i = 0; $i < 1000000; $i++) {
$test->offsetGet($object);
}
var_dump(microtime(true) - $start); // 76 seconds!
// Array + spl_object_hash()
$object = new stdClass;
$test = [];
$test[spl_object_hash($object)] = str_repeat("\0", 1024*1024);
$start = microtime(true);
for ($i = 0; $i < 1000000; $i++) {
$temp = $test[spl_object_hash($object)];
}
var_dump(microtime(true) - $start); // 0.3 seconds