3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public static $instance; public static function getInstance() { if (static::$instance === null) { static::$instance = new static(); } } } class B extends A { public static $instance; } echo get_class(A::getInstance()) . PHP_EOL; echo get_class(B::getInstance()) . PHP_EOL; echo get_class(A::getInstance()) . PHP_EOL;

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)
8.3.60.0070.00718.64
8.3.50.0140.00716.27
8.3.40.0110.00718.77
8.3.30.0140.00718.60
8.3.20.0040.00420.25
8.3.10.0060.00321.77
8.3.00.0060.00320.16
8.2.180.0150.00618.66
8.2.170.0110.00422.96
8.2.160.0100.00322.30
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0040.00717.63
8.2.110.0040.00422.25
8.2.100.0000.01117.75
8.2.90.0000.00919.21
8.2.80.0040.00417.97
8.2.70.0030.00617.63
8.2.60.0000.01317.77
8.2.50.0000.00818.07
8.2.40.0040.00419.38
8.2.30.0060.00320.64
8.2.20.0040.00417.70
8.2.10.0040.00417.95
8.2.00.0050.00217.99
8.1.280.0110.00425.92
8.1.270.0060.00923.95
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0070.00322.45
8.1.230.0090.00317.42
8.1.220.0030.00517.74
8.1.210.0080.00018.77
8.1.200.0030.00617.22
8.1.190.0030.00517.35
8.1.180.0070.00018.10
8.1.170.0040.00418.65
8.1.160.0040.00421.88
8.1.150.0020.00518.84
8.1.140.0050.00317.43
8.1.130.0040.00417.65
8.1.120.0080.00017.46
8.1.110.0040.00417.43
8.1.100.0050.00217.39
8.1.90.0040.00417.41
8.1.80.0040.00417.28
8.1.70.0000.00817.35
8.1.60.0000.00917.60
8.1.50.0050.00317.42
8.1.40.0090.00417.50
8.1.30.0040.00417.62
8.1.20.0040.00417.64
8.1.10.0000.00817.57
8.1.00.0040.00417.40
8.0.300.0070.00318.77
8.0.290.0040.00416.75
8.0.280.0030.00318.38
8.0.270.0070.00017.20
8.0.260.0030.00317.21
8.0.250.0080.00016.87
8.0.240.0030.00316.98
8.0.230.0050.00516.88
8.0.220.0070.00016.96
8.0.210.0080.00016.77
8.0.200.0030.00316.95
8.0.190.0050.00316.95
8.0.180.0090.00316.88
8.0.170.0080.00016.98
8.0.160.0000.00716.89
8.0.150.0000.00716.86
8.0.140.0000.00916.75
8.0.130.0050.00013.33
8.0.120.0000.00816.82
8.0.110.0000.00716.89
8.0.100.0000.00816.90
8.0.90.0030.00316.77
8.0.80.0090.00616.87
8.0.70.0040.00416.86
8.0.60.0060.00316.92
8.0.50.0050.00216.79
8.0.30.0120.00617.19
8.0.20.0090.01117.40
8.0.10.0080.00017.02
8.0.00.0130.00816.91
7.4.330.0020.00215.08
7.4.320.0040.00416.46
7.4.300.0000.00616.55
7.4.290.0030.00516.44
7.4.280.0000.00916.50
7.4.270.0000.00716.63
7.4.260.0070.00016.58
7.4.250.0000.00716.46
7.4.240.0020.00516.51
7.4.230.0000.00716.32
7.4.220.0100.00716.54
7.4.210.0100.01016.58
7.4.200.0070.00016.70
7.4.160.0090.00616.44
7.4.150.0170.00717.40
7.4.140.0120.00917.86
7.4.130.0100.00716.44
7.4.120.0070.01116.49
7.4.110.0150.00416.69
7.4.100.0070.01716.52
7.4.90.0030.01416.42
7.4.80.0070.01019.39
7.4.70.0100.00816.52
7.4.60.0080.00916.51
7.4.50.0040.00416.46
7.4.40.0100.00716.33
7.4.30.0150.00416.52
7.4.00.0080.00815.13
7.3.330.0030.00313.32
7.3.320.0030.00313.12
7.3.310.0080.00016.39
7.3.300.0030.00316.37
7.3.290.0050.00916.34
7.3.280.0100.00716.37
7.3.270.0070.01017.40
7.3.260.0060.01116.36
7.3.250.0110.00616.36
7.3.240.0110.01116.63
7.3.230.0060.01216.39
7.3.210.0080.00816.45
7.3.200.0070.01016.34
7.3.190.0060.01016.61
7.3.180.0120.00316.55
7.3.170.0140.00816.39
7.3.160.0120.00916.25
7.2.330.0100.01316.74
7.2.320.0140.00716.46
7.2.310.0000.01616.27
7.2.300.0120.00316.79
7.2.290.0060.01116.57
7.2.60.0130.00017.13
7.2.00.0000.01419.16
7.1.200.0140.00015.48
7.1.100.0000.01318.41
7.1.70.0070.00317.13
7.1.60.0100.00619.11
7.1.50.0070.01716.61
7.1.00.0030.07322.54
7.0.200.0030.00616.70
7.0.60.0030.08320.03
7.0.50.0070.08317.80
7.0.40.0130.07320.04
7.0.30.0300.07320.17
7.0.20.0200.05720.21
7.0.10.0130.08320.17
7.0.00.0000.09020.06
5.6.280.0030.07320.88
5.6.210.0100.05320.47
5.6.200.0070.08018.15
5.6.190.0070.08320.39
5.6.180.0430.06320.63
5.6.170.0330.07020.71
5.6.160.0100.07720.48
5.6.150.0030.04018.18
5.6.140.0100.08018.17
5.6.130.0070.08018.16
5.6.120.0070.08721.07
5.6.110.0100.07021.01
5.6.100.0100.06721.11
5.6.90.0070.09021.08
5.6.80.0030.08020.29
5.5.350.0030.07320.52
5.5.340.0030.04017.94
5.5.330.0030.07020.35
5.5.320.3930.04020.35
5.5.310.0200.07320.51
5.5.300.0070.04718.00
5.5.290.0000.07017.95
5.5.280.0070.07720.89
5.5.270.0100.07020.66
5.5.260.0130.05720.76
5.5.250.0100.07720.71
5.5.240.0070.07720.23
5.4.450.0400.05319.57
5.4.440.0300.06319.42
5.4.430.0470.05019.57
5.4.420.0230.05719.58
5.4.410.0200.06319.46
5.4.400.0230.05719.10
5.4.390.0200.06719.21
5.4.380.0330.05718.84
5.4.370.0370.05319.03
5.4.360.0370.05319.30
5.4.350.0300.05019.26
5.4.340.0230.06018.86
5.4.320.0430.06019.25
5.4.310.0300.05719.31
5.4.300.0200.06319.23
5.4.290.0230.06319.10
5.4.280.0600.07018.94
5.4.270.0500.06319.09
5.4.260.0370.04719.11
5.4.250.0270.05019.21
5.4.240.0570.05319.25
5.4.230.0400.06019.29
5.4.220.0600.05019.07
5.4.210.0330.06019.29
5.4.200.0330.06719.06
5.4.190.0330.05719.21
5.4.180.0300.04719.19
5.4.170.0300.05319.25
5.4.160.0330.05318.93
5.4.150.0330.05019.09
5.4.140.0370.04716.55
5.4.130.0270.05016.51
5.4.120.0470.07016.57
5.4.110.0670.07016.59
5.4.100.0630.05016.54
5.4.90.0600.05716.65
5.4.80.0330.04316.28
5.4.70.0300.06316.48
5.4.60.0070.07016.25
5.4.50.0030.04016.51
5.4.40.0230.07016.33
5.4.30.0400.05016.57
5.4.20.0270.04716.22

preferences:
44.46 ms | 400 KiB | 5 Q