3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$n = null; //unset($n); var_dump(array_key_exists('n', get_defined_vars()));

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)
8.3.60.0180.00318.28
8.3.50.0220.00722.03
8.3.40.0110.00418.73
8.3.30.0030.01018.96
8.3.20.0070.00020.13
8.3.10.0040.00423.66
8.3.00.0090.00317.78
8.2.180.0090.00918.11
8.2.170.0120.00322.96
8.2.160.0100.00720.44
8.2.150.0040.00424.18
8.2.140.0140.00424.66
8.2.130.0000.00726.16
8.2.120.0080.00019.23
8.2.110.0040.00422.08
8.2.100.0040.00717.97
8.2.90.0040.00419.09
8.2.80.0040.00417.97
8.2.70.0060.00317.49
8.2.60.0050.00217.80
8.2.50.0070.00418.07
8.2.40.0040.00419.82
8.2.30.0030.00318.23
8.2.20.0000.00717.52
8.2.10.0000.00717.86
8.2.00.0040.00419.46
8.1.280.0090.00625.92
8.1.270.0030.00623.91
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0040.00423.96
8.1.230.0120.00019.16
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.25
8.1.190.0030.00617.10
8.1.180.0030.00618.10
8.1.170.0050.00318.53
8.1.160.0080.00021.95
8.1.150.0000.00718.44
8.1.140.0040.00417.37
8.1.130.0000.00717.84
8.1.120.0000.00717.45
8.1.110.0000.00717.28
8.1.100.0050.00317.34
8.1.90.0000.00717.38
8.1.80.0070.00017.35
8.1.70.0030.00317.19
8.1.60.0040.00417.36
8.1.50.0000.00817.41
8.1.40.0000.00717.35
8.1.30.0000.00817.51
8.1.20.0000.00717.55
8.1.10.0040.00417.31
8.1.00.0000.00717.35
8.0.300.0070.00018.77
8.0.290.0000.00716.58
8.0.280.0080.00018.19
8.0.270.0030.00317.08
8.0.260.0000.00617.02
8.0.250.0000.00616.82
8.0.240.0000.00716.78
8.0.230.0000.00716.78
8.0.220.0030.00516.80
8.0.210.0000.00616.70
8.0.200.0030.00316.85
8.0.190.0070.00016.77
8.0.180.0070.00016.79
8.0.170.0070.00016.77
8.0.160.0040.00416.78
8.0.150.0030.00316.71
8.0.140.0070.00016.62
8.0.130.0000.00913.19
8.0.120.0050.00216.77
8.0.110.0070.00016.64
8.0.100.0040.00416.79
8.0.90.0040.00416.81
8.0.80.0110.01116.81
8.0.70.0000.00816.86
8.0.60.0000.00716.61
8.0.50.0040.00416.70
8.0.30.0090.01016.86
8.0.20.0130.01217.40
8.0.10.0060.00316.90
8.0.00.0110.00816.53
7.4.330.0000.00515.00
7.4.320.0030.00316.42
7.4.300.0030.00316.43
7.4.290.0000.00716.45
7.4.280.0040.00416.52
7.4.270.0040.00416.54
7.4.260.0000.00716.48
7.4.250.0040.00416.40
7.4.240.0000.00716.38
7.4.230.0000.00716.54
7.4.220.0090.00916.46
7.4.210.0000.01616.54
7.4.200.0070.00016.54
7.4.160.0120.00316.46
7.4.150.0100.01017.40
7.4.140.0100.00817.86
7.4.130.0110.00916.46
7.4.120.0080.00816.35
7.4.110.0090.01216.40
7.4.100.0140.00316.55
7.4.90.0100.00716.40
7.4.80.0160.00419.39
7.4.70.0070.01016.48
7.4.60.0000.01616.34
7.4.50.0030.00616.54
7.4.40.0030.01216.60
7.4.30.0080.00816.25
7.4.00.0120.00714.78
7.3.330.0060.00013.00
7.3.320.0050.00013.03
7.3.310.0030.00316.21
7.3.300.0030.00316.11
7.3.290.0150.00816.06
7.3.280.0100.00716.11
7.3.270.0090.00917.40
7.3.260.0160.00316.35
7.3.250.0100.01116.16
7.3.240.0090.00916.14
7.3.230.0090.00916.39
7.3.210.0060.01016.38
7.3.200.0090.01219.39
7.3.190.0120.01216.50
7.3.180.0160.00016.19
7.3.170.0070.00716.40
7.3.160.0030.01316.32
7.3.120.0040.01014.75
7.3.110.0060.01314.79
7.3.100.0120.00314.37
7.3.90.0030.00714.67
7.3.80.0060.00914.48
7.3.70.0000.00914.56
7.3.60.0050.00514.61
7.3.50.0110.00714.58
7.3.40.0030.01414.32
7.3.30.0040.00814.76
7.3.20.0030.01016.32
7.3.10.0030.00916.52
7.3.00.0060.00616.44
7.2.330.0210.00016.30
7.2.320.0150.00916.45
7.2.310.0090.00916.15
7.2.300.0140.00616.37
7.2.290.0100.00716.37
7.2.250.0140.00414.44
7.2.240.0060.01314.99
7.2.230.0070.01114.80
7.2.220.0100.00315.01
7.2.210.0000.01414.95
7.2.200.0100.00714.72
7.2.190.0040.01114.87
7.2.180.0100.01114.76
7.2.170.0040.01114.76
7.2.00.0080.00819.09
7.1.330.0130.00315.92
7.1.320.0030.00915.79
7.1.310.0070.00715.54
7.1.300.0150.00415.55
7.1.290.0060.01015.82
7.1.280.0030.01315.45
7.1.270.0000.01315.41
7.1.260.0030.00915.74
7.1.200.0070.00715.62
7.1.100.0000.00817.84
7.1.70.0000.01016.82
7.1.60.0140.01019.70
7.1.50.0060.01916.84
7.1.00.0030.07722.48
7.0.200.0000.00916.75
7.0.140.0130.06322.09
7.0.60.0170.06319.77
7.0.50.0030.08717.82
7.0.40.0130.08320.21
7.0.30.0170.06020.21
7.0.20.0270.08320.09
7.0.10.0100.06720.09
7.0.00.0000.04319.99
5.6.280.0000.07720.99
5.6.210.0070.06320.45
5.6.200.0100.07018.18
5.6.190.0030.04320.45
5.6.180.0300.05320.39
5.6.170.0330.07320.51
5.6.160.0030.06720.38
5.6.150.0200.07018.20
5.6.140.0070.08018.16
5.6.130.0030.08718.11
5.6.120.0000.05721.05
5.6.110.0100.08021.10
5.6.100.0130.07021.10
5.6.90.0130.03021.08
5.6.80.0130.07020.52
5.6.70.3700.05020.32
5.5.350.0130.08020.39
5.5.340.0030.08317.98
5.5.330.0070.08320.36
5.5.320.0270.05020.41
5.5.310.0200.05020.29
5.5.300.0030.06318.01
5.5.290.0130.08017.92
5.5.280.0070.07720.73
5.5.270.0100.08020.86
5.5.260.0100.05720.70
5.5.250.0130.06720.61
5.5.240.0000.03320.18
5.4.450.0770.06019.25
5.4.440.0130.05019.57
5.4.430.1230.05019.48
5.4.420.1100.05319.46
5.4.410.0770.05019.50
5.4.400.0730.05019.12
5.4.390.0730.05319.29
5.4.380.0270.05018.69
5.4.370.0230.05018.58
5.4.360.0330.04718.69
5.4.350.0530.04018.50
5.4.340.0470.04018.59
5.4.320.0050.03812.45
5.4.310.0070.03612.45
5.4.300.0060.03512.45
5.4.290.0100.04112.45
5.4.280.0110.03212.35
5.4.270.0050.03612.34
5.4.260.0070.04412.34
5.4.250.0090.03812.35
5.4.240.0030.03812.34
5.4.230.0070.04212.34
5.4.220.0070.03512.34
5.4.210.0070.04012.34
5.4.200.0050.03812.34
5.4.190.0060.03612.33
5.4.180.0030.03712.34
5.4.170.0060.03512.34
5.4.160.0040.03712.34
5.4.150.0040.03712.34
5.4.140.0060.03512.02
5.4.130.0050.03712.01
5.4.120.0020.03811.96
5.4.110.0060.03311.96
5.4.100.0060.03911.96
5.4.90.0100.03411.96
5.4.80.0100.03611.96
5.4.70.0040.03711.96
5.4.60.0040.03511.96
5.4.50.0090.03411.96
5.4.40.0080.04211.95
5.4.30.0030.03811.95
5.4.20.0030.03711.95
5.4.10.0070.03211.95
5.4.00.0040.03711.43
5.3.290.0110.03712.80
5.3.280.0030.04112.71
5.3.270.0040.04112.73
5.3.260.0060.03912.72
5.3.250.0080.03512.72
5.3.240.0070.03612.72
5.3.230.0070.03612.71
5.3.220.0050.04312.68
5.3.210.0040.04012.68
5.3.200.0120.03512.68
5.3.190.0090.03712.68
5.3.180.0070.04412.67
5.3.170.0040.03812.67
5.3.160.0060.03512.67
5.3.150.0110.03612.68
5.3.140.0060.04312.66
5.3.130.0070.04612.65
5.3.120.0060.03912.66
5.3.110.0050.04012.66
5.3.100.0070.03612.12
5.3.90.0070.03412.08
5.3.80.0040.03812.07
5.3.70.0070.03412.08
5.3.60.0060.03612.07
5.3.50.0060.03912.00
5.3.40.0070.03512.00
5.3.30.0050.03611.95
5.3.20.0060.03411.72
5.3.10.0070.03611.69
5.3.00.0060.03611.67
5.2.170.0080.0339.18
5.2.160.0070.0289.18
5.2.150.0060.0299.18
5.2.140.0070.0349.18
5.2.130.0030.0309.13
5.2.120.0030.0329.14
5.2.110.0050.0359.14
5.2.100.0050.0289.14
5.2.90.0060.0339.14
5.2.80.0030.0329.13
5.2.70.0090.0269.14
5.2.60.0080.0279.08
5.2.50.0070.0349.05
5.2.40.0080.0299.03
5.2.30.0080.0269.01
5.2.20.0060.0319.00
5.2.10.0080.0258.92
5.2.00.0040.0328.78
5.1.60.0040.0288.06
5.1.50.0050.0248.06
5.1.40.0020.0268.04
5.1.30.0070.0358.39
5.1.20.0100.0328.41
5.1.10.0020.0288.13
5.1.00.0060.0248.14
5.0.50.0030.0216.61
5.0.40.0080.0156.47
5.0.30.0040.0316.29
5.0.20.0030.0196.25
5.0.10.0030.0196.23
5.0.00.0040.0286.22
4.4.90.0040.0134.78
4.4.80.0050.0174.76
4.4.70.0030.0154.75
4.4.60.0030.0214.75
4.4.50.0030.0164.77
4.4.40.0030.0254.71
4.4.30.0050.0134.76
4.4.20.0020.0174.84
4.4.10.0020.0214.85
4.4.00.0040.0334.76
4.3.110.0030.0184.67
4.3.100.0020.0174.66
4.3.90.0030.0174.63
4.3.80.0050.0224.59
4.3.70.0050.0114.63
4.3.60.0040.0134.63
4.3.50.0040.0144.63
4.3.40.0020.0264.54
4.3.30.0020.0203.28
4.3.20.0030.0143.26
4.3.10.0040.0203.21
4.3.00.0170.0206.97

preferences:
42.49 ms | 401 KiB | 5 Q