3v4l.org

run code in 300+ PHP versions simultaneously
<?php function machine_forget(&$data) { $data = null; } $answer = 42; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // shhh no spoilers class zombie { private $val; public function __construct($val) { $this->val = $val; } public function __destruct() { $this->vessel = $this; } public function __toString() { return $this->val; } } $answer = new zombie("42"); $answer->vessel = &$answer; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer);

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)
8.3.70.0090.00616.63
8.3.60.0040.01118.43
8.3.50.0130.00822.10
8.3.40.0140.00718.79
8.3.30.0110.00419.22
8.3.20.0030.00520.29
8.3.10.0080.00020.53
8.3.00.0040.00419.38
8.2.180.0090.01316.75
8.2.170.0150.00622.96
8.2.160.0140.00020.53
8.2.150.0070.00024.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0000.00722.19
8.2.110.0030.00621.99
8.2.100.0000.01120.48
8.2.90.0040.00419.09
8.2.80.0080.00017.97
8.2.70.0040.00417.75
8.2.60.0000.00718.04
8.2.50.0000.00818.07
8.2.40.0040.00418.22
8.2.30.0040.00419.48
8.2.20.0070.00017.68
8.2.10.0050.00318.12
8.2.00.0030.00617.72
8.1.280.0070.00725.92
8.1.270.0000.00822.02
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00323.77
8.1.230.0080.00419.01
8.1.220.0040.00417.77
8.1.210.0070.00018.77
8.1.200.0090.00317.22
8.1.190.0040.00417.48
8.1.180.0080.00018.10
8.1.170.0050.00318.51
8.1.160.0070.00022.05
8.1.150.0000.00818.84
8.1.140.0070.00017.35
8.1.130.0030.00317.80
8.1.120.0000.00717.40
8.1.110.0000.00817.43
8.1.100.0040.00417.34
8.1.90.0020.00517.49
8.1.80.0050.00317.44
8.1.70.0070.00017.37
8.1.60.0060.00317.62
8.1.50.0030.00517.53
8.1.40.0060.00317.41
8.1.30.0050.00317.68
8.1.20.0050.00217.57
8.1.10.0040.00417.59
8.1.00.0040.00417.47
8.0.300.0000.00718.77
8.0.290.0000.00716.75
8.0.280.0070.00018.31
8.0.270.0020.00517.10
8.0.260.0000.00617.25
8.0.250.0030.00316.86
8.0.240.0050.00316.93
8.0.230.0070.00016.93
8.0.220.0030.00316.77
8.0.210.0070.00016.88
8.0.200.0030.00316.86
8.0.190.0070.00016.95
8.0.180.0040.00416.87
8.0.170.0030.00616.78
8.0.160.0000.00716.83
8.0.150.0000.00716.75
8.0.140.0000.00716.90
8.0.130.0030.00313.34
8.0.120.0030.00516.80
8.0.110.0030.00616.79
8.0.100.0000.00816.90
8.0.90.0030.00516.92
8.0.80.0120.00616.83
8.0.70.0000.00816.74
8.0.60.0040.00417.00
8.0.50.0040.00416.89
8.0.30.0100.01217.14
8.0.20.0030.01717.40
8.0.10.0030.00517.05
8.0.00.0130.00416.69
7.4.330.0020.00215.07
7.4.320.0030.00316.60
7.4.300.0030.00316.53
7.4.290.0070.00016.54
7.4.280.0040.00416.59
7.4.270.0030.00316.48
7.4.260.0000.00816.60
7.4.250.0040.00416.39
7.4.240.0020.00616.57
7.4.230.0040.00416.48
7.4.220.0070.01016.45
7.4.210.0040.01116.66
7.4.200.0040.00416.46
7.4.160.0120.00416.19
7.4.150.0090.00917.40
7.4.140.0120.01117.86
7.4.130.0060.01316.47
7.4.120.0140.00316.34
7.4.110.0170.00016.58
7.4.100.0110.00616.40
7.4.90.0130.00316.36
7.4.80.0120.00919.39
7.4.70.0060.01016.41
7.4.60.0070.01016.39
7.4.50.0030.00516.30
7.4.40.0100.01016.48
7.4.30.0090.00916.50
7.4.00.0100.00714.90
7.3.330.0050.00013.16
7.3.320.0050.00013.23
7.3.310.0030.00316.19
7.3.300.0030.00316.16
7.3.290.0000.01316.23
7.3.280.0110.00716.30
7.3.270.0090.00917.40
7.3.260.0110.00716.43
7.3.250.0070.01016.35
7.3.240.0170.00316.46
7.3.230.0090.00916.39
7.3.210.0140.00716.41
7.3.200.0100.01619.39
7.3.190.0060.01216.20
7.3.180.0130.00316.51
7.3.170.0090.00616.28
7.3.160.0030.01316.29
7.2.330.0120.00616.43
7.2.320.0130.00616.90
7.2.310.0080.01316.77
7.2.300.0130.01016.66
7.2.290.0090.00816.57
7.2.60.0000.00716.88
7.1.200.0040.00815.77
7.1.70.0000.00716.87
7.1.60.0100.00319.12
7.1.50.0110.01516.85
7.1.00.0100.07022.36
7.0.200.0000.00916.79
7.0.140.0030.06722.00
7.0.60.0100.07019.87
7.0.50.0070.04317.98
7.0.40.0070.05020.27
7.0.30.0330.05320.06
7.0.20.0270.06020.08
7.0.10.0270.08020.30
7.0.00.0100.04020.09
5.6.280.0000.07721.00
5.6.210.0070.03720.52
5.6.200.0030.08318.13
5.6.190.0200.06720.61
5.6.180.0170.07020.75
5.6.170.0270.03720.61
5.6.160.0070.05020.45
5.6.150.0100.07318.15
5.6.140.0030.04318.15
5.6.130.0130.07718.28
5.6.120.0070.07021.00
5.6.110.0030.06721.00
5.6.100.0100.06721.00
5.6.90.0130.04721.11
5.6.80.0170.07020.39
5.6.70.4370.04020.41
5.5.350.0070.08020.39
5.5.340.0030.08017.98
5.5.330.0030.08720.19
5.5.320.0270.07320.42
5.5.310.0170.04320.30
5.5.300.0100.07718.09
5.5.290.0030.05717.98
5.5.280.0030.05320.96
5.5.270.0030.04720.68
5.5.260.0100.04020.94
5.5.250.0030.09020.67
5.5.240.0130.07020.19
5.4.450.0300.05019.55
5.4.440.0630.04319.45
5.4.430.0230.04719.45
5.4.420.0170.03719.45
5.4.410.0370.04719.45
5.4.400.0200.04319.45
5.4.390.0230.04319.45
5.4.380.0630.08318.75
5.4.370.0470.04718.72
5.4.360.0500.07018.77
5.4.350.0270.05718.48
5.4.340.0300.05318.65
5.4.320.0090.03312.51
5.4.310.0040.03912.51
5.4.300.0040.03812.51
5.4.290.0040.03912.51
5.4.280.0070.03312.40
5.4.270.0070.03312.40
5.4.260.0090.03212.40
5.4.250.0040.03912.40
5.4.240.0080.03312.40
5.4.230.0050.03912.39
5.4.220.0110.03412.39
5.4.210.0050.03512.39
5.4.200.0080.04012.39
5.4.190.0070.03712.39
5.4.180.0060.04012.39
5.4.170.0110.03812.40
5.4.160.0020.04112.39
5.4.150.0050.03912.39
5.4.140.0070.03712.08
5.4.130.0060.03512.06
5.4.120.0100.05012.02
5.4.110.0020.04612.01
5.4.100.0060.03512.02
5.4.90.0050.03912.02
5.4.80.0070.03912.02
5.4.70.0050.03912.02
5.4.60.0030.03712.02
5.4.50.0060.03912.02
5.4.40.0070.04312.00
5.4.30.0080.04112.00
5.4.20.0080.03212.00
5.4.10.0060.03611.99
5.4.00.0060.03811.48
5.3.290.0070.04212.80
5.3.280.0080.03612.71
5.3.270.0090.05412.72
5.3.260.0060.03812.72
5.3.250.0080.04112.72
5.3.240.0080.03412.72
5.3.230.0080.04012.71
5.3.220.0060.03712.68
5.3.210.0050.04912.68
5.3.200.0060.03812.68
5.3.190.0060.03712.68
5.3.180.0050.03712.67
5.3.170.0060.03612.67
5.3.160.0080.03312.67
5.3.150.0030.03912.67
5.3.140.0050.03512.66
5.3.130.0070.03812.66
5.3.120.0060.03912.66
5.3.110.0080.04412.66
5.3.100.0050.04812.12
5.3.90.0030.05312.11
5.3.80.0060.03712.10
5.3.70.0060.03612.10
5.3.60.0050.03812.08
5.3.50.0050.03712.03
5.3.40.0060.03512.03
5.3.30.0030.03611.98
5.3.20.0060.03311.77
5.3.10.0040.03511.73
5.3.00.0050.03611.72
5.2.170.0060.0309.23
5.2.160.0070.0299.22
5.2.150.0070.0359.22
5.2.140.0030.0329.22
5.2.130.0030.0309.18
5.2.120.0060.0279.18
5.2.110.0040.0299.18
5.2.100.0050.0279.18
5.2.90.0070.0269.18
5.2.80.0050.0319.18
5.2.70.0030.0319.18
5.2.60.0030.0319.14
5.2.50.0020.0319.10
5.2.40.0050.0289.08
5.2.30.0060.0279.05
5.2.20.0050.0279.04
5.2.10.0020.0298.95
5.2.00.0040.0338.81
5.1.60.0030.0248.10
5.1.50.0060.0288.09
5.1.40.0040.0248.07
5.1.30.0040.0268.42
5.1.20.0050.0328.44
5.1.10.0060.0288.17
5.1.00.0040.0318.17
5.0.50.0090.0166.65
5.0.40.0050.0206.46
5.0.30.0040.0306.27
5.0.20.0070.0246.23
5.0.10.0060.0186.22
5.0.00.0040.0336.21
4.4.90.0030.0234.78
4.4.80.0020.0154.75
4.4.70.0040.0144.76
4.4.60.0020.0164.76
4.4.50.0010.0204.77
4.4.40.0030.0244.71
4.4.30.0030.0144.76
4.4.20.0060.0164.85
4.4.10.0020.0154.85
4.4.00.0020.0244.76
4.3.110.0020.0164.67
4.3.100.0030.0214.66
4.3.90.0050.0114.63
4.3.80.0020.0254.59
4.3.70.0010.0164.63
4.3.60.0020.0214.63
4.3.50.0020.0154.63
4.3.40.0020.0234.54
4.3.30.0020.0213.30
4.3.20.0010.0163.28
4.3.10.0020.0163.24
4.3.00.0100.01719.45

preferences:
72.74 ms | 401 KiB | 5 Q