3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private static self $singleton; private function __construct() {} public static function getInstance(): self { if(!isset(self::$singleton)) { self::$singleton = new self; } return self::$singleton; } } $a = A::getInstance(); $b = A::getInstance(); $c = A::getInstance(); var_dump($a); var_dump($b); var_dump($c);

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)
8.4.120.0130.00724.11
8.4.110.0130.00818.69
8.4.100.0130.00717.81
8.4.90.0130.00817.81
8.4.80.0120.00720.87
8.4.70.0060.00217.75
8.4.60.0150.00517.75
8.4.50.0150.00719.43
8.4.40.0130.00717.85
8.4.30.0050.01418.60
8.4.20.0160.00317.68
8.4.10.0060.00321.92
8.3.250.0090.00618.72
8.3.240.0120.00717.12
8.3.230.0140.00616.72
8.3.220.0050.00417.19
8.3.210.0090.00916.57
8.3.200.0080.01116.61
8.3.190.0110.00817.49
8.3.180.0090.01216.33
8.3.170.0040.01417.17
8.3.160.0110.00719.25
8.3.150.0040.01519.01
8.3.140.0110.00318.86
8.3.130.0050.00318.27
8.3.120.0090.00920.73
8.3.110.0090.00620.94
8.3.100.0000.01024.06
8.3.90.0080.00026.77
8.3.80.0080.00416.38
8.3.70.0160.00316.63
8.3.60.0120.00318.43
8.3.50.0170.00318.27
8.3.40.0090.00620.30
8.3.30.0090.00618.67
8.3.20.0040.00424.18
8.3.10.0040.00424.66
8.3.00.0070.00026.16
8.2.290.0090.01120.53
8.2.280.0120.00816.64
8.2.270.0160.00319.03
8.2.260.0140.00316.60
8.2.250.0130.00316.44
8.2.240.0060.00318.88
8.2.230.0000.00822.58
8.2.220.0090.00037.54
8.2.210.0050.00226.77
8.2.200.0040.00416.75
8.2.190.0120.00316.58
8.2.180.0090.00625.92
8.2.170.0040.01119.03
8.2.160.0030.01422.96
8.2.150.0000.00725.66
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00426.16
8.2.110.0070.00422.25
8.2.100.0000.01117.84
8.2.90.0040.00417.75
8.2.80.0000.00817.97
8.2.70.0080.00017.63
8.2.60.0030.00517.50
8.2.50.0000.00818.05
8.2.40.0060.00318.13
8.2.30.0000.00717.98
8.2.20.0040.00419.30
8.2.10.0040.00418.17
8.2.00.0040.00419.16
8.1.330.0120.00621.97
8.1.320.0070.00416.30
8.1.310.0000.00718.56
8.1.300.0130.00318.61
8.1.290.0110.00030.84
8.1.280.0090.00925.92
8.1.270.0040.00424.66
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0050.00523.89
8.1.230.0110.00017.64
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0040.00417.35
8.1.190.0050.00517.35
8.1.180.0050.00318.10
8.1.170.0030.00517.62
8.1.160.0040.00419.08
8.1.150.0040.00418.64
8.1.140.0050.00317.36
8.1.130.0070.00018.89
8.1.120.0040.00417.44
8.1.110.0050.00317.32
8.1.100.0030.00517.38
8.1.90.0040.00417.46
8.1.80.0070.00017.48
8.1.70.0070.00017.46
8.1.60.0000.00817.47
8.1.50.0000.00717.51
8.1.40.0050.00317.43
8.1.30.0040.00317.64
8.1.20.0000.01017.62
8.1.10.0160.00317.57
8.1.00.0160.00217.53
8.0.300.0040.00418.77
8.0.290.0000.00716.75
8.0.280.0040.00418.49
8.0.270.0050.00216.88
8.0.260.0000.00618.32
8.0.250.0050.00216.97
8.0.240.0000.00716.88
8.0.230.0120.00416.86
8.0.220.0030.01016.73
8.0.210.0150.00016.79
8.0.200.0120.00216.85
8.0.190.0110.00416.79
8.0.180.0090.00616.87
8.0.170.0070.00716.95
8.0.160.0090.00616.84
8.0.150.0110.00416.77
8.0.140.0150.00016.79
8.0.130.0160.00016.82
8.0.120.0160.00016.76
8.0.110.0060.01016.86
8.0.100.0160.00016.70
8.0.90.0100.00516.71
8.0.80.0110.00416.71
8.0.70.0110.00416.74
8.0.60.0100.00516.83
8.0.50.0050.01016.67
8.0.30.0080.00716.94
8.0.20.0130.00316.91
8.0.10.0110.00417.02
7.4.330.0000.00515.55
7.4.320.0000.00616.61
7.4.300.0120.00316.58
7.4.290.0110.00416.59
7.4.280.0100.00716.61
7.4.270.0140.00216.48
7.4.260.0040.01316.58
7.4.250.0150.00316.53
7.4.240.0130.00316.40
7.4.230.0140.00316.60
7.4.220.0120.00316.48
7.4.210.0080.00516.59
7.4.200.0110.00316.39
7.4.190.0070.00716.58
7.4.180.0140.00016.61
7.4.160.0090.00316.55
7.4.150.0050.00916.54
7.4.140.0050.01016.27
7.4.130.0120.00316.50
7.4.120.0040.01116.37
7.4.110.0140.00016.37
7.4.100.0130.00016.43
7.4.90.0140.00016.43
7.4.80.0140.00016.35
7.4.70.0040.01116.41
7.4.60.0090.00616.52
7.4.50.0140.00016.30
7.4.40.0000.01216.20
7.4.30.0100.00316.43
7.4.20.0090.00416.43
7.4.10.0110.00316.44
7.4.00.0100.00316.38

preferences:
69.08 ms | 403 KiB | 5 Q