3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Singleton { /** * @var Singleton The reference to *Singleton* instance of this class */ private static $instance; /** * Returns the *Singleton* instance of this class. * * @return Singleton The *Singleton* instance. */ public static function getInstance() { if (null === self::$instance) { self::$instance = new static(); } return self::$instance; } /** * Protected constructor to prevent creating a new instance of the * *Singleton* via the `new` operator from outside of this class. */ protected function __construct() { } /** * Private clone method to prevent cloning of the instance of the * *Singleton* instance. * * @return void */ private function __clone() { } /** * Private unserialize method to prevent unserializing of the *Singleton* * instance. * * @return void */ private function __wakeup() { } } class SingletonChild extends Singleton { } $obj = Singleton::getInstance(); var_dump($obj === Singleton::getInstance()); // bool(true) $anotherObj = SingletonChild::getInstance(); var_dump($anotherObj === Singleton::getInstance()); // bool(false) var_dump($anotherObj === SingletonChild::getInstance()); // bool(true)

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)
8.3.60.0110.00818.53
8.3.50.0130.00721.14
8.3.40.0120.00318.68
8.3.30.0070.00718.96
8.3.20.0000.00820.16
8.3.10.0070.00021.83
8.3.00.0080.00019.04
8.2.180.0070.01016.75
8.2.170.0120.00318.95
8.2.160.0100.00722.96
8.2.150.0030.00624.18
8.2.140.0140.00724.66
8.2.130.0050.00226.16
8.2.120.0000.00820.95
8.2.110.0090.00022.08
8.2.100.0090.00317.75
8.2.90.0040.00419.23
8.2.80.0030.00617.97
8.2.70.0060.00317.63
8.2.60.0030.00917.55
8.2.50.0030.00618.07
8.2.40.0040.00419.94
8.2.30.0040.00417.89
8.2.20.0080.00017.62
8.2.10.0060.00318.13
8.2.00.0000.00718.06
8.1.280.0070.00725.92
8.1.270.0040.00420.27
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0070.00323.91
8.1.230.0060.00617.83
8.1.220.0030.00517.74
8.1.210.0050.00318.77
8.1.200.0030.00617.22
8.1.190.0080.00017.23
8.1.180.0030.00518.10
8.1.170.0030.00618.46
8.1.160.0040.00422.03
8.1.150.0040.00418.86
8.1.140.0080.00017.51
8.1.130.0060.00317.91
8.1.120.0040.00417.32
8.1.110.0040.00417.37
8.1.100.0070.00017.28
8.1.90.0030.00317.30
8.1.80.0070.00417.30
8.1.70.0000.00717.35
8.1.60.0060.00317.58
8.1.50.0000.00817.58
8.1.40.0000.00817.50
8.1.30.0030.00617.67
8.1.20.0000.00917.66
8.1.10.0000.00717.46
8.1.00.0000.00817.41
8.0.300.0000.00718.77
8.0.290.0080.00016.63
8.0.280.0000.00718.40
8.0.270.0000.00717.12
8.0.260.0040.00418.27
8.0.250.0030.00317.02
8.0.240.0030.00517.04
8.0.230.0030.00317.01
8.0.220.0030.00316.78
8.0.210.0070.00016.86
8.0.200.0030.00316.98
8.0.190.0000.00716.93
8.0.180.0070.00016.98
8.0.170.0040.00417.02
8.0.160.0000.00716.72
8.0.150.0040.00416.77
8.0.140.0050.00616.78
8.0.130.0050.00013.33
8.0.120.0000.00816.82
8.0.110.0000.00716.92
8.0.100.0040.00416.86
8.0.90.0000.00716.79
8.0.80.0030.01716.96
8.0.70.0000.00716.72
8.0.60.0000.00816.85
8.0.50.0000.00716.95
8.0.30.0110.00817.07
8.0.20.0090.01117.40
8.0.10.0040.00316.98
8.0.00.0100.00916.73
7.4.330.0050.00015.20
7.4.320.0030.00316.62
7.4.300.0030.00316.61
7.4.290.0070.00016.55
7.4.280.0040.00416.39
7.4.270.0000.00616.50
7.4.260.0040.00416.54
7.4.250.0040.00416.52
7.4.240.0020.00616.53
7.4.230.0050.00316.69
7.4.220.0120.00616.52
7.4.210.0080.00616.71
7.4.200.0000.00716.42
7.4.160.0090.00616.46
7.4.150.0090.01217.40
7.4.140.0050.01617.86
7.4.130.0130.01316.52
7.4.120.0080.00916.55
7.4.110.0130.01016.54
7.4.100.0120.00816.41
7.4.90.0090.00916.54
7.4.80.0120.01119.39
7.4.70.0100.01016.59
7.4.60.0100.00716.39
7.4.50.0040.00416.53
7.4.40.0140.00716.30
7.4.30.0140.00416.71
7.4.00.0030.01314.85
7.3.330.0000.00513.36
7.3.320.0000.00613.23
7.3.310.0070.00016.40
7.3.300.0030.00316.22
7.3.290.0090.00716.34
7.3.280.0070.01116.35
7.3.270.0070.01017.40
7.3.260.0060.01216.39
7.3.240.0100.00716.32
7.3.230.0110.00716.58
7.3.210.0090.00616.47
7.3.200.0090.00919.39
7.3.190.0090.00616.54
7.3.180.0090.00916.50
7.3.170.0110.01116.49
7.3.160.0030.01616.64
7.2.330.0090.01116.53
7.2.320.0150.00716.36
7.2.310.0070.01316.58
7.2.300.0110.00616.67
7.2.290.0110.00716.73
7.2.60.0070.00716.70
7.2.00.0000.01219.29
7.1.200.0030.01015.91
7.1.100.0060.00917.71
7.1.70.0000.00916.93
7.1.60.0070.01019.59
7.1.50.0040.01416.64
7.1.00.0000.08022.42
7.0.200.0200.00416.35
7.0.100.0030.04719.98
7.0.90.0030.05319.98
7.0.80.0170.05719.91
7.0.70.0070.08320.04
7.0.60.0130.04319.96
7.0.50.0130.07720.37
7.0.40.0070.07020.13
7.0.30.0030.05320.18
7.0.20.0000.07020.11
7.0.10.0100.07720.05
7.0.00.0070.07020.08
5.6.280.0000.07721.08
5.6.250.0100.06720.63
5.6.240.0070.04020.76
5.6.230.0070.08320.60
5.6.220.0070.04720.61
5.6.210.0070.04720.76
5.6.200.0130.07721.09
5.6.190.0100.07720.97
5.6.180.0070.07021.04
5.6.170.0200.04021.09
5.6.160.0030.08021.04
5.6.150.0030.05020.97
5.6.140.0000.06021.07
5.6.130.0170.05721.07
5.6.120.0130.04721.08
5.6.110.0130.07020.95
5.6.100.0030.06721.09
5.6.90.0000.06320.99
5.6.80.0070.05720.42
5.6.70.0170.07020.50
5.6.60.0200.03720.45
5.6.50.0100.04020.34
5.6.40.0070.04020.38
5.6.30.0070.04320.38
5.6.20.0030.04720.40
5.6.10.0070.03720.39
5.6.00.0000.04320.28
5.5.380.0030.04720.40
5.5.370.0100.06020.46
5.5.360.0030.08320.58
5.5.350.0200.06320.46
5.5.340.0000.04720.65
5.5.330.0100.04720.88
5.5.320.0000.07020.80
5.5.310.0030.04720.80
5.5.300.0100.07020.73
5.5.290.0070.06020.80
5.5.280.0100.03720.73
5.5.270.0130.05320.82
5.5.260.0270.06320.88
5.5.250.0030.04320.65
5.5.240.0070.05020.31
5.5.230.0030.06020.18
5.5.220.0030.05020.19
5.5.210.0000.04320.24
5.5.200.0070.03720.24
5.5.190.0030.04020.24
5.5.180.0030.04020.21
5.5.160.0030.04020.28
5.5.150.0000.04320.13
5.5.140.0030.04020.23
5.5.130.0030.03320.14
5.5.120.0070.03020.23
5.5.110.0070.03020.22
5.5.100.0070.03020.06
5.5.90.0070.02720.07
5.5.80.0070.02720.07
5.5.70.0070.03019.95
5.5.60.0000.03720.05
5.5.50.0070.03020.04
5.5.40.0070.03020.14
5.5.30.0030.03720.11
5.5.20.0030.03720.11
5.5.10.0070.03020.05
5.5.00.0030.03320.04
5.4.450.0100.07019.53
5.4.440.0100.08019.37
5.4.430.0070.05719.41
5.4.420.0070.05019.20
5.4.410.0000.06019.40
5.4.400.0000.05718.84
5.4.390.0100.04319.04
5.4.380.0130.03019.03
5.4.370.0130.03318.85
5.4.360.0030.04318.89
5.4.350.0100.03719.20
5.4.340.0070.04019.07
5.4.320.0030.04019.01
5.4.310.0030.04019.13
5.4.300.0070.03719.04
5.4.290.0070.02719.13
5.4.280.0070.03318.95
5.4.270.0030.03019.13
5.4.260.0070.02718.88
5.4.250.0070.02719.09
5.4.240.0070.02718.89
5.4.230.0030.03319.13
5.4.220.0100.02719.02
5.4.210.0000.03319.02
5.4.200.0030.03018.94
5.4.190.0030.03319.02
5.4.180.0000.03318.89
5.4.170.0030.03019.03
5.4.160.0030.03319.00
5.4.150.0000.03719.18
5.4.140.0030.03016.39
5.4.130.0070.02716.29
5.4.120.0030.03316.48
5.4.110.0000.03316.49
5.4.100.0070.02716.56
5.4.90.0070.02316.56
5.4.80.0000.03016.52
5.4.70.0000.03716.40
5.4.60.0000.03016.34
5.4.50.0030.03016.30
5.4.40.0100.02316.50
5.4.30.0030.03016.32
5.4.20.0070.02716.40
5.4.10.0000.03716.45
5.4.00.0000.03315.90
5.3.290.0030.03714.81
5.3.280.0030.03014.66
5.3.270.0070.02714.54
5.3.260.0030.03314.75
5.3.250.0030.03014.72
5.3.240.0030.03014.72
5.3.230.0070.02714.57
5.3.220.0000.03314.63
5.3.210.0000.03314.67
5.3.200.0070.02714.50
5.3.190.0030.03314.55
5.3.180.0000.04014.49
5.3.170.0070.02714.54
5.3.160.0030.03014.70
5.3.150.0030.03014.57
5.3.140.0000.03314.59
5.3.130.0070.03314.48
5.3.120.0030.03014.52
5.3.110.0070.02714.54
5.3.100.0100.02314.10
5.3.90.0000.03314.01
5.3.80.0000.03314.01
5.3.70.0000.03314.04
5.3.60.0000.03314.02
5.3.50.0000.03313.96
5.3.40.0070.05013.86
5.3.30.0030.05013.80
5.3.20.0070.04313.79
5.3.10.0100.05313.63
5.3.00.0100.04013.57
5.2.170.0030.02311.01
5.2.160.0130.03711.06
5.2.150.0030.03011.26
5.2.140.0070.03311.04
5.2.130.0100.05711.12
5.2.120.0070.04011.02
5.2.110.0000.05011.15
5.2.100.0030.04710.98
5.2.90.0030.05011.13
5.2.80.0100.04011.21
5.2.70.0070.03311.20
5.2.60.0070.04011.14
5.2.50.0130.05010.90
5.2.40.0030.03710.93
5.2.30.0030.04710.88
5.2.20.0100.05310.91
5.2.10.0230.03010.98
5.2.00.0100.06010.77
5.1.60.0070.02710.66
5.1.50.0100.04010.66
5.1.40.0030.05010.66
5.1.30.0100.03310.66
5.1.20.0100.03010.66
5.1.10.0030.05710.66
5.1.00.0000.04010.66
5.0.50.0070.03710.66
5.0.40.0030.02310.66
5.0.30.0030.05310.66
5.0.20.0030.04010.66
5.0.10.0100.02010.66
5.0.00.0070.04710.66
4.4.90.0000.02310.66
4.4.80.0000.03310.66
4.4.70.0000.02310.66
4.4.60.0030.01710.66
4.4.50.0030.02310.66
4.4.40.0030.03010.66
4.4.30.0030.02710.66
4.4.20.0030.04010.66
4.4.10.0000.03310.66
4.4.00.0000.03710.66
4.3.110.0070.02710.66
4.3.100.0030.03310.66
4.3.90.0070.02010.66
4.3.80.0070.03310.66
4.3.70.0000.02710.66
4.3.60.0030.01710.66
4.3.50.0100.02310.66
4.3.40.0000.02710.66
4.3.30.0030.01310.66
4.3.20.0000.01710.66
4.3.10.0000.02310.66
4.3.00.0000.02710.66

preferences:
63.01 ms | 401 KiB | 5 Q