3v4l.org

run code in 300+ PHP versions simultaneously
<?php readonly class ImmutableBadNumberGenerator { public function __construct(private readonly int $i) {} public function generate(): int { static $j = 1; ++$j; return $this->i + $j; } } $o = new ImmutableBadNumberGenerator(10); var_dump($o->generate()); var_dump($o->generate()); var_dump($o->generate());

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.2.10.0050.00317.83
8.1.130.0040.01217.33
8.1.120.0170.00017.36
8.1.110.0140.00517.33
8.1.100.0080.00817.37
8.1.90.0170.00017.33
8.1.80.0180.00017.37
8.1.70.0160.00017.33
8.1.60.0140.00617.36
8.1.50.0150.00817.33
8.1.40.0170.00317.54
8.1.30.0190.00417.52
8.1.20.0150.00617.45
8.1.10.0180.00417.43
8.1.00.0140.00717.33
8.0.260.0120.00417.33
8.0.250.0130.00417.33
8.0.240.0110.00417.33
8.0.230.0120.00417.33
8.0.220.0160.00317.33
8.0.210.0130.00317.33
8.0.200.0120.00417.33
8.0.190.0170.00017.33
8.0.180.0050.01117.33
8.0.170.0170.00017.33
8.0.160.0130.00217.33
8.0.150.0140.00317.33
8.0.140.0130.00317.33
8.0.130.0130.00317.33
8.0.120.0180.00017.33
8.0.110.0130.00817.33
8.0.100.0090.00917.33
8.0.90.0100.00817.33
8.0.80.0130.00317.33
8.0.70.0130.00317.33
8.0.60.0150.00017.33
8.0.50.0160.00017.33
8.0.30.0090.00917.33
8.0.20.0130.00317.33
8.0.10.0090.00917.33

preferences:
141.81 ms | 1394 KiB | 7 Q