3v4l.org

run code in 300+ PHP versions simultaneously
<?php abstract class Singleton { protected static $instance = null; /** * make contrutor not public */ protected function __construct() { } /** * @return static */ public static function getInstance() { if (static::$instance === null) { static::$instance = new static(); } return static::$instance; } } class ExampleSingleton extends Singleton { public $name = 'x'; } $s = ExampleSingleton::getInstance(); echo $s->name; $s->name = 'y'; echo ExampleSingleton::getInstance()->name; $s2 = new ExampleSingleton(); echo $s2->name;

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)
8.3.60.0120.00616.75
8.3.50.0100.01017.66
8.3.40.0030.01518.91
8.3.30.0110.00318.84
8.3.20.0050.00318.95
8.3.10.0030.00620.61
8.3.00.0080.00019.38
8.2.180.0090.00916.88
8.2.170.0090.01222.96
8.2.160.0110.00720.45
8.2.150.0060.00324.18
8.2.140.0030.00624.66
8.2.130.0080.00026.16
8.2.120.0030.00621.05
8.2.110.0000.01020.96
8.2.100.0110.00017.97
8.2.90.0000.00919.39
8.2.80.0040.00419.48
8.2.70.0050.00317.75
8.2.60.0060.00318.03
8.2.50.0030.00618.07
8.2.40.0060.00318.22
8.2.30.0000.00818.01
8.2.20.0070.00317.68
8.2.10.0000.00717.66
8.2.00.0050.00217.75
8.1.280.0150.00625.92
8.1.270.0000.00824.66
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0060.00322.55
8.1.230.0120.00021.04
8.1.220.0040.00417.79
8.1.210.0040.00418.92
8.1.200.0000.01317.23
8.1.190.0030.00617.53
8.1.180.0080.00018.10
8.1.170.0060.00318.74
8.1.160.0040.00418.86
8.1.150.0050.00318.52
8.1.140.0060.00317.47
8.1.130.0040.00417.90
8.1.120.0030.00317.48
8.1.110.0070.00017.32
8.1.100.0000.00717.36
8.1.90.0000.00717.38
8.1.80.0030.00317.43
8.1.70.0070.00017.29
8.1.60.0000.00917.49
8.1.50.0000.00817.49
8.1.40.0040.00417.52
8.1.30.0040.00417.56
8.1.20.0000.00817.70
8.1.10.0040.00417.61
8.1.00.0040.00417.48
8.0.300.0000.00719.89
8.0.290.0070.00016.75
8.0.280.0070.00018.43
8.0.270.0000.00817.24
8.0.260.0000.00816.96
8.0.250.0040.00416.93
8.0.240.0000.00717.07
8.0.230.0000.00716.94
8.0.220.0000.00716.97
8.0.210.0000.00916.82
8.0.200.0000.00716.90
8.0.190.0000.00816.91
8.0.180.0030.00316.97
8.0.170.0030.00616.89
8.0.160.0040.00416.91
8.0.150.0040.00416.90
8.0.140.0040.00416.74
8.0.130.0030.00313.32
8.0.120.0040.00416.93
8.0.110.0040.00416.79
8.0.100.0040.00416.79
8.0.90.0040.00416.76
8.0.80.0070.00716.98
8.0.70.0030.00516.94
8.0.60.0040.00416.71
8.0.50.0000.00716.95
8.0.30.0130.00617.02
8.0.20.0080.01517.29
8.0.10.0060.00317.02
8.0.00.0120.00916.67
7.4.330.0050.00013.04
7.4.320.0030.00316.59
7.4.300.0070.00016.63
7.4.290.0030.00316.54
7.4.280.0060.00316.59
7.4.270.0070.00016.44
7.4.260.0000.00513.36
7.4.250.0060.00316.51
7.4.240.0040.00416.63
7.4.230.0000.00716.65
7.4.220.0090.01316.66
7.4.210.0070.00716.61
7.4.200.0030.00316.35
7.4.190.0040.00416.55
7.4.160.0000.01616.49
7.4.150.0070.01116.58
7.4.140.0050.01416.55
7.4.130.0100.00816.70
7.4.120.0150.00216.49
7.4.110.0100.01016.50
7.4.100.0110.01116.59
7.4.90.0030.01416.67
7.4.80.0070.01019.39
7.4.70.0060.01216.72
7.4.60.0030.01316.59
7.4.50.0000.00916.40
7.4.40.0030.01016.63
7.4.30.0070.01116.32
7.4.00.0070.00714.92
7.3.330.0030.00313.45
7.3.320.0030.00313.36
7.3.310.0030.00516.27
7.3.300.0040.00416.29
7.3.290.0120.00316.34
7.3.280.0100.00616.34
7.3.270.0290.01616.39
7.3.260.0080.00816.31
7.3.250.0090.00816.42
7.3.240.0120.01216.64
7.3.230.0120.00616.37
7.3.210.0090.00916.34
7.3.200.0070.01316.45
7.3.190.0130.00316.52
7.3.180.0100.00716.60
7.3.170.0100.01416.57
7.3.160.0120.00316.32
7.3.120.0130.00314.88
7.2.330.0000.01916.75
7.2.320.0090.00916.78
7.2.310.0130.00716.71
7.2.300.0070.01516.73
7.2.290.0070.01016.85
7.2.80.0000.01516.75
7.2.60.0070.00717.03
7.2.00.0000.00919.50
7.1.200.0090.00315.83
7.1.100.0070.00718.23
7.1.70.0090.00617.22
7.1.60.0140.01119.40
7.1.50.0100.01017.04
7.1.00.0030.03322.45
7.0.200.0040.00416.64
7.0.140.0030.07021.97
7.0.120.0030.04322.09
7.0.60.0130.07319.92
7.0.50.0030.08717.92
7.0.40.0070.04017.75
7.0.30.0070.07017.81
7.0.20.0170.08017.77
7.0.10.0100.08317.85
7.0.00.0000.04717.84
5.6.280.0000.07721.03
5.6.210.0000.09020.70
5.6.200.0070.07318.19
5.6.190.0130.04018.27
5.6.180.0100.04718.15
5.6.170.0100.07718.14
5.6.160.0030.04018.29
5.6.150.0030.04318.16
5.6.140.0130.06718.17
5.6.130.0100.08018.11
5.6.120.0100.07318.11
5.6.110.0070.04718.28
5.6.100.0030.06018.14
5.6.90.0030.04318.16
5.6.80.0070.07717.67
5.6.70.0130.07717.55
5.6.60.0070.05317.55
5.6.50.0100.06017.67
5.6.40.0070.05017.53
5.6.30.0100.07717.64
5.6.20.0030.08017.64
5.6.10.0130.04017.53
5.6.00.0000.06017.61
5.5.350.0070.04720.41
5.5.340.0130.05717.94
5.5.330.0070.08017.94
5.5.320.0030.08717.95
5.5.310.0100.04317.98
5.5.300.0130.07017.96
5.5.290.0130.08018.01
5.5.280.0070.08317.97
5.5.270.0130.08018.04
5.5.260.0030.08317.97
5.5.250.0030.04317.90
5.5.240.0170.05017.35
5.5.230.0200.04017.32
5.5.220.0030.04017.36
5.5.210.0000.05317.43
5.5.200.0130.07017.34
5.5.190.0130.07017.44
5.5.180.0030.04017.33
5.5.160.0130.05717.43
5.5.150.0130.07017.32
5.5.140.0100.07017.27
5.5.130.0070.07017.43
5.5.120.0070.08017.36
5.5.110.0100.07317.39
5.5.100.0030.06317.20
5.5.90.0130.04717.33
5.5.80.0070.07317.23
5.5.70.0130.06317.32
5.5.60.0130.05017.21
5.5.50.0100.07017.25
5.5.40.0070.05017.19
5.5.30.0200.06717.22
5.5.20.0100.06017.30
5.5.10.0130.03317.19
5.5.00.0030.04017.28
5.4.450.0070.08319.43
5.4.440.0170.06719.28
5.4.430.0100.07319.36
5.4.420.0130.07319.38
5.4.410.0070.07719.34
5.4.400.0030.03719.06
5.4.390.0170.03719.27
5.4.380.0000.06719.11
5.4.370.0070.06719.00
5.4.360.0030.08319.12
5.4.350.0070.05019.03
5.4.340.0030.08019.05
5.4.320.0100.07319.04
5.4.310.0030.08319.10
5.4.300.0030.07319.01
5.4.290.0170.06319.07
5.4.280.0100.04719.13
5.4.270.0070.07719.04
5.4.260.0070.07319.11
5.4.250.0070.08318.96
5.4.240.0030.06719.03
5.4.230.0030.08019.04
5.4.220.0030.05319.12
5.4.210.0070.04719.27
5.4.200.0030.04318.96
5.4.190.0070.07318.96
5.4.180.0100.03319.08
5.4.170.0000.05019.04
5.4.160.0030.08019.12
5.4.150.0070.03719.01
5.4.140.0030.03716.29
5.4.130.0030.03716.37
5.4.120.0070.03316.37
5.4.110.0000.05716.53
5.4.100.0030.08016.48
5.4.90.0170.06716.43
5.4.80.0100.06016.51
5.4.70.0100.07316.44
5.4.60.0070.03716.38
5.4.50.0130.06016.36
5.4.40.0130.06016.50
5.4.30.0070.06716.40
5.4.20.0100.04016.45
5.4.10.0100.03316.37
5.4.00.0070.05015.98
5.3.290.0000.06714.52
5.3.280.0170.06714.56
5.3.270.0070.04014.63
5.3.260.0030.04714.62
5.3.250.0000.04314.71
5.3.240.0030.06314.63
5.3.230.0070.04714.60
5.3.220.0070.04014.58
5.3.210.0030.04714.41
5.3.200.0030.06714.61
5.3.190.0170.06714.64
5.3.180.0070.08014.66
5.3.170.0070.05014.62
5.3.160.0100.07714.67
5.3.150.0030.06014.56
5.3.140.0000.05014.56
5.3.130.0100.04314.64
5.3.120.0070.06714.61
5.3.110.0100.04714.60
5.3.100.0000.04013.91
5.3.90.0070.03314.03
5.3.80.0030.03714.06
5.3.70.0030.03714.05
5.3.60.0030.03313.99
5.3.50.0000.04013.82
5.3.40.0030.03314.00
5.3.30.0000.03713.90
5.3.20.0070.03013.75
5.3.10.0030.03313.66
5.3.00.0030.03713.68
5.2.170.0000.03011.20
5.2.160.0000.03311.14
5.2.150.0030.02711.17
5.2.140.0000.03011.20
5.2.130.0000.03011.18
5.2.120.0000.03011.20
5.2.110.0030.02711.08
5.2.100.0030.02711.13
5.2.90.0000.03011.13
5.2.80.0030.03011.11
5.2.70.0030.02711.08
5.2.60.0000.03011.09
5.2.50.0030.02711.01
5.2.40.0100.02710.85
5.2.30.0030.02711.02
5.2.20.0000.03011.03
5.2.10.0070.02310.75
5.2.00.0030.02710.82
5.1.60.0070.02310.21
5.1.50.0000.0279.92
5.1.40.0000.0239.89
5.1.30.0030.02310.39
5.1.20.0030.02310.45
5.1.10.0030.02310.15
5.1.00.0000.02710.17
5.0.50.0030.0208.63
5.0.40.0030.0178.40
5.0.30.0000.0308.30
5.0.20.0000.0208.22
5.0.10.0030.0178.22
5.0.00.0000.0308.22
4.4.90.0030.0138.22
4.4.80.0030.0178.22
4.4.70.0000.0178.22
4.4.60.0000.0178.22
4.4.50.0000.0178.22
4.4.40.0000.0238.22
4.4.30.0030.0138.22
4.4.20.0000.0178.22
4.4.10.0030.0138.22
4.4.00.0030.0208.22
4.3.110.0070.0108.22
4.3.100.0000.0138.22
4.3.90.0000.0138.22
4.3.80.0000.0238.22
4.3.70.0030.0138.22
4.3.60.0000.0138.22
4.3.50.0030.0138.22
4.3.40.0070.0178.22
4.3.30.0000.0208.22
4.3.20.0000.0208.22
4.3.10.0030.0138.22
4.3.00.0000.0308.22

preferences:
37.76 ms | 401 KiB | 5 Q