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
Description
Returns the data associated with an object in the storage.
Return Values
The data previously associated with the object in the storage.
Errors/Exceptions
Throws UnexpectedValueException when object could not be found.
Examples
Example #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]
?>The above example will output something similar to:
string(5) "hello" NULL
See Also
- 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
