The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.
SplObjectStorage
double(1.3110690116882)
[object_hash => value]
double(2.4147419929504)
SplObjectStorage::offsetGet
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplObjectStorage::offsetGet — Returns the data associated with an object
Descrição
Returns the data associated with an object in the storage.
Valor Retornado
The data previously associated with the object in the storage.
Erros/Exceções
Throws UnexpectedValueException when object could not be found.
Exemplos
Exemplo #1 SplObjectStorage::offsetGet() example
<?php
$s = new SplObjectStorage;
$o1 = new stdClass;
$o2 = new stdClass;
$s[$o1] = "hello";
$s->attach($o2);
var_dump($s->offsetGet($o1)); // Similar to $s[$o1]
var_dump($s->offsetGet($o2)); // Similar to $s[$o2]
?>O exemplo acima produzirá algo semelhante a:
string(5) "hello" NULL
Veja Também
- SplObjectStorage::offsetSet() - Associates data to an object in the storage
- SplObjectStorage::offsetExists() - Checks whether an object exists in the storage
- SplObjectStorage::offsetUnset() - Removes an object from the storage
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User Contributed Notes 2 notes
acgrid ¶
8 years ago
kontrollfreak+php at gmail dot com ¶
9 years ago
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
