Bene, oggi mi sono incuriosito sulla base del benchmark @magallanes, quindi l'ho ampliato un po '. Ho aumentato alcuni dei cicli for per evidenziare davvero gli spazi tra le cose. Funziona su Apache 2.4, mod_php e PHP 7.2.
Ecco una tabella di riepilogo per semplificare i risultati:
+---------------------------+---------+-----------------+
| Test | Memory | Time |
+---------------------------+---------+-----------------+
| Array | 2305848 | 9.5637300014496 |
| stdClass | 2505824 | 11.212271928787 |
| SomeClass | 164920 | 3.9636149406433 | <-- *
| AnotherClass | 2563136 | 10.872401237488 |
| SetterClass | 905848 | 59.879059791565 |
| SetterClassDefineReturn | 905792 | 60.484427213669 |
| SetterClassSetFromParam | 745792 | 62.783381223679 |
| SetterClassSetKeyAndParam | 745824 | 72.155715942383 |
+---------------------------+---------+-----------------+
* - Winner winner chicken dinner
Di seguito è riportato lo script modificato. Volevo testare l'impostazione delle proprietà con metodi e la definizione dei tipi. Sono rimasto molto sorpreso di scoprire che l'uso dei metodi setter aggiunge un successo significativo al codice. Ora, questo è un test delle prestazioni molto molto specifico in cui molte app non lo faranno nemmeno. Ma se hai un sito che gestisce 1000 / req / secondo con 1000 classi che vengono utilizzate con migliaia di oggetti, puoi vedere come ciò potrebbe influire sulle prestazioni.
<?php
set_time_limit(500);
class SomeClass {
public $aaa;
public $bbb;
public $ccc;
}
class AnotherClass {
}
class SetterClass {
public $aaa;
public $bbb;
public $ccc;
public function setAAA() {
$this->aaa = 'aaa';
}
public function setBBB() {
$this->bbb = 'bbb';
}
public function setCCC() {
$this->ccc = $this->aaa.$this->bbb;
}
}
class SetterClassDefineReturn {
public $aaa;
public $bbb;
public $ccc;
public function setAAA():void {
$this->aaa = 'aaa';
}
public function setBBB():void {
$this->bbb = 'bbb';
}
public function setCCC():void {
$this->ccc = $this->aaa.$this->bbb;
}
}
class SetterClassSetFromParam {
public $aaa;
public $bbb;
public $ccc;
public function setAAA(string $val): void {
$this->aaa = $val;
}
public function setBBB(string $val): void {
$this->bbb = $val;
}
public function setCCC(string $val): void {
$this->ccc = $val;
}
}
class SetterClassSetKeyAndParam {
public $aaa;
public $bbb;
public $ccc;
public function set(string $key, string $val): void {
$this->{$key} = $val;
}
}
function p($i) {
echo '<pre>';
print_r($i);
echo '</pre>';
echo '<hr>';
}
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<1000; $i++) {
$z = new SomeClass();
for ($j=0; $j<10000; $j++) {
$z->aaa = 'aaa';
$z->bbb = 'bbb';
$z->ccc = $z->aaa.$z->bbb;
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new AnotherClass();
for ($j=0; $j<5000; $j++) {
$z->aaa = 'aaa';
$z->bbb = 'bbb';
$z->ccc = $z->aaa.$z->bbb;
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new SetterClass();
for ($j=0; $j<5000; $j++) {
$z->setAAA();
$z->setBBB();
$z->setCCC();
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new SetterClassDefineReturn();
for ($j=0; $j<5000; $j++) {
$z->setAAA();
$z->setBBB();
$z->setCCC();
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new SetterClassSetFromParam();
for ($j=0; $j<5000; $j++) {
$z->setAAA('aaa');
$z->setBBB('bbb');
$z->setCCC('aaabbb');
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new SetterClassSetKeyAndParam();
for ($j=0; $j<5000; $j++) {
$z->set('aaa', 'aaa');
$z->set('bbb', 'bbb');
$z->set('ccc', 'aaabbb');
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = new stdClass();
for ($j=0; $j<5000; $j++) {
$z->aaa = 'aaa';
$z->bbb = 'bbb';
$z->ccc = $z->aaa.$z->bbb;
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
$t0 = microtime(true);
$arraysOf=[];
$inicio=memory_get_usage();
for ($i=0; $i<5000; $i++) {
$z = [];
for ($j=0; $j<5000; $j++) {
$z['aaa'] = 'aaa';
$z['bbb'] = 'bbb';
$z['ccc'] = $z['aaa'].$z['bbb'];
}
$arraysOf[]=$z;
}
$fin=memory_get_usage();
echo '<p>Time Taken (seconds): '.(microtime(true) - $t0).'</p>';
echo '<p>Memory: '.($fin-$inicio).'</p>';
p($z);
Ed ecco i risultati:
Time Taken (seconds): 3.9636149406433
Memory: 164920
SomeClass Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
-----
Time Taken (seconds): 10.872401237488
Memory: 2563136
AnotherClass Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 59.879059791565
Memory: 905848
SetterClass Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 60.484427213669
Memory: 905792
SetterClassDefineReturn Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 62.783381223679
Memory: 745792
SetterClassSetFromParam Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 72.155715942383
Memory: 745824
SetterClassSetKeyAndParam Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 11.212271928787
Memory: 2505824
stdClass Object
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)
----
Time Taken (seconds): 9.5637300014496
Memory: 2305848
Array
(
[aaa] => aaa
[bbb] => bbb
[ccc] => aaabbb
)