3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Singleton { protected static $instance = null; /** * make contrutor not public */ protected function __construct() { } /** * @return static */ public static function getInstance() { if (self::$instance === null) { self::$instance = new self(); } return self::$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)
8.3.40.0070.01118.98
8.3.30.0070.00718.88
8.3.20.0080.00018.73
8.3.10.0030.00620.66
8.3.00.0060.00319.27
8.2.170.0140.00722.96
8.2.160.0210.00019.32
8.2.150.0090.00024.18
8.2.140.0030.00524.66
8.2.130.0080.00026.16
8.2.120.0080.00021.00
8.2.110.0030.00619.27
8.2.100.0050.00517.95
8.2.90.0040.00418.95
8.2.80.0000.00817.97
8.2.70.0000.00817.46
8.2.60.0050.00317.79
8.2.50.0040.00418.10
8.2.40.0030.00618.16
8.2.30.0040.00417.98
8.2.20.0030.00617.78
8.2.10.0040.00417.90
8.2.00.0040.00417.77
8.1.270.0070.00024.66
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0030.00917.23
8.1.230.0080.00417.77
8.1.220.0030.00517.75
8.1.210.0040.00418.77
8.1.200.0060.00317.23
8.1.190.0090.00017.23
8.1.180.0080.00018.10
8.1.170.0060.00318.90
8.1.160.0000.00818.85
8.1.150.0000.00818.48
8.1.140.0000.00717.46
8.1.130.0000.00717.85
8.1.120.0040.00417.29
8.1.110.0050.00317.30
8.1.100.0040.00417.44
8.1.90.0000.00717.39
8.1.80.0030.00317.41
8.1.70.0040.00417.42
8.1.60.0030.00617.61
8.1.50.0020.00517.33
8.1.40.0040.00417.44
8.1.30.0000.00817.64
8.1.20.0000.00717.52
8.1.10.0000.00817.60
8.1.00.0040.00417.46
8.0.300.0000.00720.85
8.0.290.0040.00816.62
8.0.280.0080.00018.39
8.0.270.0000.00717.28
8.0.260.0030.00316.82
8.0.250.0080.00016.97
8.0.240.0000.00817.02
8.0.230.0070.00016.93
8.0.220.0080.00016.96
8.0.210.0000.00716.90
8.0.200.0030.00316.96
8.0.190.0000.00816.99
8.0.180.0080.00016.95
8.0.170.0030.00616.88
8.0.160.0040.00416.98
8.0.150.0000.00816.91
8.0.140.0000.00816.89
8.0.130.0050.00013.32
8.0.120.0040.00416.77
8.0.110.0000.00716.80
8.0.100.0000.00716.91
8.0.90.0000.00816.77
8.0.80.0090.01216.94
8.0.70.0050.00216.95
8.0.60.0000.00716.97
8.0.50.0040.00416.82
8.0.30.0090.00917.02
8.0.20.0260.01317.37
8.0.10.0000.00716.86
8.0.00.0060.01416.89
7.4.330.0000.00512.99
7.4.320.0030.00316.45
7.4.300.0060.00016.67
7.4.290.0000.00716.48
7.4.280.0050.00316.55
7.4.270.0000.00716.62
7.4.260.0030.00313.22
7.4.250.0050.00516.46
7.4.240.0040.00416.60
7.4.230.0000.00716.52
7.4.220.0100.00716.38
7.4.210.0090.00616.56
7.4.200.0040.00416.62
7.4.190.0040.00416.54
7.4.160.0120.00516.48
7.4.150.0140.00716.57
7.4.140.0120.00616.63
7.4.130.0090.01416.70
7.4.120.0100.00816.60
7.4.110.0000.01816.52
7.4.100.0150.00616.65
7.4.90.0090.00916.73
7.4.80.0090.00819.39
7.4.70.0000.01716.64
7.4.60.0030.01216.68
7.4.50.0000.01316.52
7.4.40.0140.00316.50
7.4.30.0170.00016.43
7.4.00.0040.01414.69
7.3.330.0030.00313.33
7.3.320.0050.00013.32
7.3.310.0000.00716.49
7.3.300.0030.00316.22
7.3.290.0130.00316.38
7.3.280.0090.00816.42
7.3.270.0040.01316.45
7.3.260.0110.00616.33
7.3.250.0080.00916.53
7.3.240.0070.01116.48
7.3.230.0080.01316.55
7.3.210.0150.00416.50
7.3.200.0110.01116.48
7.3.190.0090.01216.48
7.3.180.0060.01116.40
7.3.170.0130.00616.39
7.3.160.0100.00616.25
7.3.120.0090.00614.86
7.2.330.0090.00916.77
7.2.320.0110.00716.91
7.2.310.0150.01216.79
7.2.300.0070.01016.70
7.2.290.0060.01016.61
7.2.60.0030.01216.94
7.2.00.0040.00819.13
7.1.200.0030.00615.76
7.1.100.0070.00418.04
7.1.70.0040.00417.30
7.1.60.0070.01719.40
7.1.50.0030.01317.02
7.1.00.0130.05722.37
7.0.200.0070.00016.64
7.0.140.0030.07722.04
7.0.120.0030.03722.17
7.0.60.0100.03319.82
7.0.50.0030.04017.98
7.0.40.0070.08720.10
7.0.30.0470.08020.25
7.0.20.0300.08020.26
7.0.10.0100.08720.20
7.0.00.0030.05020.09
5.6.280.0000.07721.15
5.6.210.0100.07320.55
5.6.200.0100.08318.18
5.6.190.0130.08020.55
5.6.180.0300.07020.77
5.6.170.0230.03320.54
5.6.160.0070.06020.54
5.6.150.0070.08018.22
5.6.140.0170.06318.27
5.6.130.0130.07318.28
5.6.120.0000.09321.12
5.6.110.0170.07020.96
5.6.100.0030.06020.96
5.6.90.0100.06320.99
5.6.80.0200.05720.40
5.5.350.0200.07720.44
5.5.340.0000.08018.02
5.5.330.0170.07320.40
5.5.320.0030.04020.31
5.5.310.0300.08020.30
5.5.300.0000.05717.98
5.5.290.0100.05718.01
5.5.280.0070.05320.66
5.5.270.0000.04720.65
5.5.260.0100.06720.90
5.5.250.0100.06720.59
5.5.240.0270.07320.37
5.4.450.0030.03719.57
5.4.440.0000.04019.30
5.4.430.0000.04019.46
5.4.420.0030.03719.54
5.4.410.0030.03319.29
5.4.400.0000.03718.98
5.4.390.0030.04319.09
5.4.380.0000.03719.22
5.4.370.0030.03318.83
5.4.360.0000.04018.87
5.4.350.0100.07018.85
5.4.340.0170.05719.21
5.4.320.0070.03719.14
5.4.310.0100.07318.87
5.4.300.0070.07319.20
5.4.290.0070.04019.22
5.4.280.0030.08018.97
5.4.270.0070.05719.19
5.4.260.0030.03719.08
5.4.250.0100.03019.22
5.4.240.0070.04319.13
5.4.230.0070.05018.97
5.4.220.0030.04318.98
5.4.210.0030.04319.19
5.4.200.0030.07319.04
5.4.190.0100.05319.17
5.4.180.0100.04018.97
5.4.170.0030.05018.84
5.4.160.0030.07019.32
5.4.150.0170.06719.04
5.4.140.0030.07016.44
5.4.130.0070.04716.38
5.4.120.0000.07316.46
5.4.110.0100.06716.61
5.4.100.0030.07716.41
5.4.90.0030.04316.56
5.4.80.0070.06316.49
5.4.70.0000.04716.57
5.4.60.0100.06716.54
5.4.50.0100.03016.44
5.4.40.0000.04716.30
5.4.30.0130.06316.42
5.4.20.0000.07316.32
5.4.10.0000.08016.51
5.4.00.0030.04315.78
5.3.290.0000.04314.89
5.3.280.0000.07714.51
5.3.270.0070.06714.58
5.3.260.0100.07314.76
5.3.250.0100.06014.52
5.3.240.0100.07014.60
5.3.230.0000.08014.68
5.3.220.0000.07314.54
5.3.210.0100.06714.79
5.3.200.0000.07014.48
5.3.190.0000.04314.79
5.3.180.0100.05714.62
5.3.170.0030.06014.64
5.3.160.0100.04714.57
5.3.150.0030.05714.54
5.3.140.0000.04014.57
5.3.130.0030.07314.77
5.3.120.0070.07314.60
5.3.110.0030.07714.47
5.3.100.0070.07314.30
5.3.90.0030.04314.30
5.3.80.0030.07014.30
5.3.70.0070.05714.30
5.3.60.0000.06714.30
5.3.50.0070.06714.30
5.3.40.0070.06714.30
5.3.30.0030.05014.30
5.3.20.0070.06014.30
5.3.10.0030.05714.30
5.3.00.0000.05714.30
5.2.170.0030.06714.30
5.2.160.0130.06014.30
5.2.150.0030.06014.30
5.2.140.0030.06314.30
5.2.130.0030.06314.30
5.2.120.0030.05714.30
5.2.110.0000.06314.30
5.2.100.0030.03014.30
5.2.90.0000.03314.30
5.2.80.0070.05714.30
5.2.70.0070.05314.30
5.2.60.0030.03714.30
5.2.50.0030.06014.30
5.2.40.0100.05314.30
5.2.30.0030.04714.30
5.2.20.0070.05714.30
5.2.10.0000.06014.30
5.2.00.0000.06314.30
5.1.60.0030.04014.30
5.1.50.0030.03714.30
5.1.40.0000.05714.30
5.1.30.0070.05314.30
5.1.20.0030.05014.30
5.1.10.0030.04714.30
5.1.00.0000.06014.30
5.0.50.0030.04714.30
5.0.40.0000.04314.30
5.0.30.0000.06714.30
5.0.20.0000.04014.30
5.0.10.0030.04314.30
5.0.00.0030.06314.30
4.4.90.0000.03014.30
4.4.80.0000.04014.30
4.4.70.0030.03314.30
4.4.60.0000.03314.30
4.4.50.0030.03314.30
4.4.40.0000.05714.30
4.4.30.0000.01714.30
4.4.20.0000.03314.30
4.4.10.0030.03714.30
4.4.00.0030.05714.30
4.3.110.0000.04014.30
4.3.100.0000.03314.30
4.3.90.0030.02314.30
4.3.80.0100.02314.30
4.3.70.0000.03014.30
4.3.60.0000.03714.30
4.3.50.0000.03314.30
4.3.40.0030.05314.30
4.3.30.0000.04014.30
4.3.20.0000.02714.30
4.3.10.0030.02314.30
4.3.00.0070.02014.30

preferences:
42.87 ms | 400 KiB | 5 Q