3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Check { private static $instance; public function getInstance($name) { if (isset(self::$instance)) { return self::$instance; } self::$instance = $name; return self::$instance; } } $a = new Check; var_dump($a->getInstance('a')); $b = new Check; var_dump($b->getInstance('b')); var_dump($a->getInstance());

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)
8.3.40.0170.00018.87
8.3.30.0110.00419.21
8.3.20.0040.00420.34
8.3.10.0040.00423.57
8.3.00.0000.00819.18
8.2.170.0070.00722.96
8.2.160.0100.00320.32
8.2.150.0070.00024.18
8.2.140.0090.00024.66
8.2.130.0070.00026.16
8.2.120.0060.00321.07
8.2.110.0060.00322.04
8.2.100.0110.00019.39
8.2.90.0000.00819.05
8.2.80.0000.00817.97
8.2.70.0040.00417.63
8.2.60.0040.00417.93
8.2.50.0030.00618.07
8.2.40.0080.00018.16
8.2.30.0040.00418.06
8.2.20.0080.00017.82
8.2.10.0070.00018.08
8.2.00.0050.00217.67
8.1.270.0040.00423.86
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0090.00023.86
8.1.230.0090.00919.05
8.1.220.0040.00417.78
8.1.210.0030.00618.77
8.1.200.0100.00017.35
8.1.190.0080.00017.25
8.1.180.0030.00518.10
8.1.170.0040.00418.65
8.1.160.0070.00021.90
8.1.150.0000.00718.77
8.1.140.0070.00017.39
8.1.130.0030.00317.76
8.1.120.0070.00017.53
8.1.110.0030.00517.45
8.1.100.0040.00417.36
8.1.90.0040.00417.51
8.1.80.0080.00017.48
8.1.70.0040.00417.43
8.1.60.0030.00617.63
8.1.50.0040.00417.59
8.1.40.0080.00017.60
8.1.30.0030.00517.63
8.1.20.0080.00417.73
8.1.10.0000.00717.57
8.1.00.0070.00017.55
8.0.300.0050.00218.77
8.0.290.0000.00716.88
8.0.280.0030.00318.46
8.0.270.0030.00317.30
8.0.260.0030.00317.39
8.0.250.0030.00317.09
8.0.240.0000.00717.00
8.0.230.0000.00716.98
8.0.220.0030.00316.87
8.0.210.0070.00016.99
8.0.200.0070.00017.10
8.0.190.0080.00016.95
8.0.180.0000.00717.00
8.0.170.0050.00316.98
8.0.160.0100.00016.96
8.0.150.0000.00716.82
8.0.140.0050.00216.91
8.0.130.0040.00413.44
8.0.120.0060.00316.92
8.0.110.0040.00416.96
8.0.100.0040.00416.75
8.0.90.0040.00417.00
8.0.80.0100.00717.00
8.0.70.0000.00817.02
8.0.60.0060.00316.92
8.0.50.0040.00416.91
8.0.30.0100.00917.28
8.0.20.0100.01117.40
8.0.10.0070.00017.09
8.0.00.0090.00916.96
7.4.330.0000.00615.09
7.4.320.0000.00716.42
7.4.300.0030.00316.52
7.4.290.0070.00016.52
7.4.280.0030.00516.45
7.4.270.0030.00316.61
7.4.260.0030.00316.52
7.4.250.0000.00816.48
7.4.240.0040.00316.53
7.4.230.0030.00516.73
7.4.220.0090.00916.51
7.4.210.0140.00816.56
7.4.200.0030.00316.64
7.4.160.0090.00616.44
7.4.150.0070.01317.40
7.4.140.0100.01017.86
7.4.130.0110.00716.55
7.4.120.0120.00816.56
7.4.110.0180.00016.55
7.4.100.0110.00716.56
7.4.90.0150.00316.58
7.4.80.0100.01019.39
7.4.70.0060.01516.65
7.4.60.0090.01116.76
7.4.50.0050.00316.59
7.4.40.0100.00716.45
7.4.30.0060.01316.67
7.4.00.0120.00314.96
7.3.330.0030.00213.42
7.3.320.0050.00013.24
7.3.310.0030.00316.48
7.3.300.0000.00716.34
7.3.290.0080.00916.39
7.3.280.0070.01016.44
7.3.270.0120.00617.40
7.3.260.0080.00816.38
7.3.250.0090.00816.33
7.3.240.0090.00916.41
7.3.230.0090.00616.51
7.3.210.0110.00616.64
7.3.200.0090.00919.39
7.3.190.0170.00316.40
7.3.180.0090.00616.34
7.3.170.0180.00316.39
7.3.160.0140.00516.37
7.2.330.0170.00716.66
7.2.320.0120.00616.73
7.2.310.0030.01816.71
7.2.300.0070.01416.65
7.2.290.0060.00916.72
7.2.60.0280.00716.88
7.1.200.0040.00815.74
7.1.100.0040.01218.01
7.1.70.0000.01216.95
7.1.60.0140.01019.40
7.1.50.0060.01916.70
7.1.00.0070.07022.30
7.0.200.0050.00216.46
7.0.140.0030.07722.09
7.0.60.0070.08020.03
7.0.50.0030.08317.72
7.0.40.0030.04720.15
7.0.30.0200.04320.34
7.0.20.0330.04020.21
7.0.10.0030.04720.31
7.0.00.0070.07720.24
5.6.280.0030.07320.82
5.6.210.0070.04320.57
5.6.200.0070.08718.29
5.6.190.0030.04320.47
5.6.180.0200.04020.45
5.6.170.0330.05020.56
5.6.160.0100.07720.40
5.6.150.0070.08318.14
5.6.140.0070.06718.18
5.6.130.0100.04318.14
5.6.120.0070.08320.98
5.6.110.0100.08021.05
5.6.100.0000.05320.89
5.6.90.0100.07020.96
5.6.80.0130.07320.46
5.5.350.0030.08720.42
5.5.340.0030.06318.08
5.5.330.0030.04320.21
5.5.320.0430.06320.30
5.5.310.0300.05720.50
5.5.300.0030.09318.02
5.5.290.0030.04717.98
5.5.280.0130.06720.77
5.5.270.0030.05020.87
5.5.260.0070.05020.94
5.5.250.0130.07320.61
5.5.240.0370.06020.19
5.4.450.0500.04719.33
5.4.440.0470.03019.49
5.4.430.0430.03019.54
5.4.420.0370.03319.63
5.4.410.0370.03719.50
5.4.400.0400.03319.20
5.4.390.0400.03318.98
5.4.380.0370.03319.14
5.4.370.0330.04319.22
5.4.360.0370.03319.00
5.4.350.0400.03319.16
5.4.340.0370.03319.09
5.4.320.0300.04018.95
5.4.310.0370.03319.00
5.4.300.0400.03319.20
5.4.290.0300.04019.30
5.4.280.0370.03719.21
5.4.270.0330.03719.21
5.4.260.0370.03719.15
5.4.250.0270.04319.30
5.4.240.0600.05319.20
5.4.230.0370.05018.80
5.4.220.0500.03719.21
5.4.210.0330.03718.86
5.4.200.0730.03719.30
5.4.190.0370.03719.21
5.4.180.0370.03319.04
5.4.170.0470.03718.85
5.4.160.0400.04719.18
5.4.150.0400.03019.21
5.4.140.0370.03316.48
5.4.130.0400.03016.31
5.4.120.0370.03316.34
5.4.110.0370.03316.25
5.4.100.0570.03016.45
5.4.90.0400.03016.58
5.4.80.0470.03016.18
5.4.70.0430.04016.44
5.4.60.0330.03316.39
5.4.50.0370.03316.52
5.4.40.0370.03316.59
5.4.30.0370.03316.34
5.4.20.0330.04016.51
5.4.10.0370.03316.16
5.4.00.0300.04316.11
5.3.290.0270.04314.56
5.3.280.0400.03014.53
5.3.270.0370.03714.61
5.3.260.0330.04014.76
5.3.250.0430.03014.61
5.3.240.0300.04014.61
5.3.230.0500.06014.52
5.3.220.0330.05014.57
5.3.210.0430.04314.62
5.3.200.0330.05714.56
5.3.190.0300.04314.55
5.3.180.0330.06014.57
5.3.170.0330.04014.54
5.3.160.0500.05714.58
5.3.150.0430.06714.49
5.3.140.0400.07014.48
5.3.130.0600.03314.54
5.3.120.0370.05314.52
5.3.110.0500.06314.66
5.3.100.0430.04014.26
5.3.90.0370.03314.24
5.3.80.0500.06313.93
5.3.70.0430.06314.02
5.3.60.0400.06314.01
5.3.50.0400.04713.96
5.3.40.0430.04713.86
5.3.30.0400.04713.92
5.3.20.0430.06013.60
5.3.10.0430.03713.57
5.3.00.0430.04013.61
5.2.170.0470.03012.59
5.2.160.0400.04012.59
5.2.150.0500.05712.59
5.2.140.0400.03312.59
5.2.130.0500.04312.59
5.2.120.0470.05712.59
5.2.110.0470.04712.59
5.2.100.0400.03012.59
5.2.90.0500.03012.59
5.2.80.0430.05312.59
5.2.70.0400.03012.59
5.2.60.0470.04712.59
5.2.50.0400.05312.59
5.2.40.0370.03012.59
5.2.30.0300.04712.59
5.2.20.0370.05012.59
5.2.10.0400.05712.59
5.2.00.0330.03312.59
5.1.60.0470.04312.59
5.1.50.0300.04712.59
5.1.40.0400.03312.59
5.1.30.0370.04012.59
5.1.20.0300.04712.59
5.1.10.0330.03712.59
5.1.00.0500.01712.59
5.0.50.0170.04312.59
5.0.40.0170.04012.59
5.0.30.0170.05012.59
5.0.20.0200.04012.59
5.0.10.0200.02312.59
5.0.00.0230.05712.59
4.4.90.0200.02312.59
4.4.80.0330.02012.59
4.4.70.0170.02312.59
4.4.60.0200.01712.59
4.4.50.0230.03012.59
4.4.40.0170.05012.59
4.4.30.0200.02712.59
4.4.20.0170.02312.59
4.4.10.0170.02312.59
4.4.00.0230.04012.59
4.3.110.0130.02012.59
4.3.100.0230.02312.59
4.3.90.0170.02012.59
4.3.80.0170.03012.59
4.3.70.0100.02312.59
4.3.60.0200.03012.59
4.3.50.0170.02012.59
4.3.40.0230.04312.59
4.3.30.0130.01712.59
4.3.20.0070.02012.59
4.3.10.0130.03012.59
4.3.00.0100.03312.59

preferences:
46.04 ms | 400 KiB | 5 Q