3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a =null;var_dump(isset($a));var_dump(isset($b));

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)
8.3.40.0090.00618.67
8.3.30.0110.00419.04
8.3.20.0040.00420.34
8.3.10.0050.00321.90
8.3.00.0080.00017.80
8.2.170.0090.00622.96
8.2.160.0100.00320.41
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0040.00420.98
8.2.110.0070.00320.52
8.2.100.0040.00817.60
8.2.90.0050.00318.22
8.2.80.0000.00817.97
8.2.70.0000.00817.50
8.2.60.0000.00917.68
8.2.50.0040.00418.07
8.2.40.0040.00418.09
8.2.30.0030.00618.04
8.2.20.0040.00417.50
8.2.10.0040.00417.93
8.2.00.0070.00017.66
8.1.270.0110.00423.96
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0090.00022.10
8.1.230.0040.00820.93
8.1.220.0000.00817.74
8.1.210.0080.00019.00
8.1.200.0030.00617.09
8.1.190.0030.00517.00
8.1.180.0040.00418.10
8.1.170.0060.00318.52
8.1.160.0000.00721.85
8.1.150.0050.00218.87
8.1.140.0000.00717.40
8.1.130.0030.00317.81
8.1.120.0050.00317.41
8.1.110.0000.00817.28
8.1.100.0040.00417.32
8.1.90.0070.00017.43
8.1.80.0030.00417.29
8.1.70.0070.00017.36
8.1.60.0070.00017.55
8.1.50.0000.00817.44
8.1.40.0060.00317.39
8.1.30.0000.00917.50
8.1.20.0000.00817.42
8.1.10.0000.00817.33
8.1.00.0090.00017.38
8.0.300.0040.00420.09
8.0.290.0000.00716.59
8.0.280.0050.00218.31
8.0.270.0070.00017.20
8.0.260.0000.00617.11
8.0.250.0000.00716.76
8.0.240.0000.00816.88
8.0.230.0030.00316.91
8.0.220.0080.00316.69
8.0.210.0030.00616.70
8.0.200.0060.00016.85
8.0.190.0000.00716.80
8.0.180.0000.00816.79
8.0.170.0050.00216.76
8.0.160.0040.00416.88
8.0.150.0080.00016.66
8.0.140.0030.00616.72
8.0.130.0060.00013.32
8.0.120.0040.00416.77
8.0.110.0040.00416.87
8.0.100.0000.00716.83
8.0.90.0000.00716.83
8.0.80.0070.00716.87
8.0.70.0000.00716.66
8.0.60.0000.00716.70
8.0.50.0000.00716.79
8.0.30.0090.00916.84
8.0.20.0140.00717.40
8.0.10.0080.00016.90
8.0.00.0050.01316.55
7.4.330.0030.00315.00
7.4.320.0060.00016.44
7.4.300.0030.00316.58
7.4.290.0000.00816.52
7.4.280.0030.00316.33
7.4.270.0000.00816.45
7.4.260.0000.00716.55
7.4.250.0080.00016.45
7.4.240.0010.00616.54
7.4.230.0070.00016.24
7.4.220.0100.00616.39
7.4.210.0110.00416.45
7.4.200.0040.00416.59
7.4.160.0120.00416.37
7.4.150.0140.00417.40
7.4.140.0110.01117.86
7.4.130.0100.00616.37
7.4.120.0080.00916.41
7.4.110.0120.00416.44
7.4.100.0090.00916.21
7.4.90.0100.00716.64
7.4.80.0070.01419.39
7.4.70.0130.00316.35
7.4.60.0120.00616.55
7.4.50.0050.00016.43
7.4.40.0060.00916.33
7.4.30.0130.00316.43
7.4.00.0060.00914.98
7.3.330.0060.00012.98
7.3.320.0050.00013.04
7.3.310.0030.00316.18
7.3.300.0000.00616.15
7.3.290.0090.00616.13
7.3.280.0110.00816.15
7.3.270.0110.00717.40
7.3.260.0170.00016.02
7.3.250.0060.00916.36
7.3.240.0060.01116.32
7.3.230.0110.00816.39
7.3.210.0110.00716.18
7.3.200.0130.00616.20
7.3.190.0090.01116.14
7.3.180.0090.00616.12
7.3.170.0060.01016.43
7.3.160.0030.01316.34
7.3.120.0060.00914.89
7.2.330.0140.00416.46
7.2.320.0090.00916.55
7.2.310.0060.01316.54
7.2.300.0060.00916.29
7.2.290.0090.00616.49
7.2.00.0030.01018.96
7.1.200.0030.00315.57
7.1.100.0030.00918.04
7.1.70.0060.00317.14
7.1.60.0090.01519.25
7.1.50.0070.01316.76
7.1.00.0070.07322.45
7.0.200.0000.00716.66
7.0.140.0100.06022.12
7.0.60.0100.05720.00
7.0.50.0070.08317.83
7.0.40.0070.04320.05
7.0.30.0300.08020.15
7.0.20.0130.04320.20
7.0.10.0100.03720.02
7.0.00.0130.07320.16
5.6.280.0000.07720.89
5.6.210.0070.07720.47
5.6.200.0030.04018.19
5.6.190.0100.06720.29
5.6.180.0230.08320.62
5.6.170.0270.08020.71
5.6.160.0000.04320.54
5.6.150.0100.05018.16
5.6.140.0030.04318.13
5.6.130.0130.06718.08
5.6.120.0200.05321.11
5.6.110.0070.06321.06
5.6.100.0170.08021.10
5.6.90.0130.08021.09
5.6.80.0030.03720.50
5.5.350.0170.07720.41
5.5.340.0000.07317.92
5.5.330.0100.08320.23
5.5.320.0200.04020.27
5.5.310.0430.07020.17
5.5.300.0070.08317.89
5.5.290.0130.04718.02
5.5.280.0130.04320.80
5.5.270.0100.05020.86
5.5.260.0130.07020.87
5.5.250.0130.08020.70
5.5.240.0030.08020.18
5.4.450.0700.06719.50
5.4.440.1070.06719.48
5.4.430.0830.06319.40
5.4.420.1070.07019.47
5.4.410.0100.05318.94
5.4.400.0270.07318.71
5.4.390.0500.06318.58
5.4.380.0270.05018.72
5.4.370.0200.04718.68
5.4.360.0170.05018.52
5.4.350.0260.09811.97
5.4.340.0040.03911.96
5.4.320.0080.04412.45
5.4.310.0060.03912.45
5.4.300.0090.03412.45
5.4.290.0050.04512.45
5.4.280.0060.03512.35
5.4.270.0070.04212.34
5.4.260.0090.03512.34
5.4.250.0070.05012.35
5.4.240.0030.04712.34
5.4.230.0070.03812.34
5.4.220.0050.03712.34
5.4.210.0090.03412.34
5.4.200.0110.04112.34
5.4.190.0080.03512.34
5.4.180.0060.03612.34
5.4.170.0030.03912.34
5.4.160.0060.03512.34
5.4.150.0040.03812.34
5.4.140.0070.03912.02
5.4.130.0040.04312.01
5.4.120.0060.03611.97
5.4.110.0100.03511.96
5.4.100.0080.03311.96
5.4.90.0100.04311.96
5.4.80.0080.04111.96
5.4.70.0090.04111.96
5.4.60.0050.03511.96
5.4.50.0060.03911.96
5.4.40.0070.04311.95
5.4.30.0090.03311.95
5.4.20.0050.03511.94
5.4.10.0090.03311.95
5.4.00.0080.03411.44
5.3.290.0050.04012.80
5.3.280.0070.04312.71
5.3.270.0080.04612.73
5.3.260.0080.03812.72
5.3.250.0070.03712.72
5.3.240.0100.03412.72
5.3.230.0070.04012.71
5.3.220.0090.03512.68
5.3.210.0050.04012.68
5.3.200.0020.04012.68
5.3.190.0050.03912.68
5.3.180.0070.03712.68
5.3.170.0060.03912.67
5.3.160.0090.03712.68
5.3.150.0070.04012.68
5.3.140.0090.03612.66
5.3.130.0050.03912.66
5.3.120.0030.04112.66
5.3.110.0070.04512.66
5.3.100.0060.03712.12
5.3.90.0050.03812.08
5.3.80.0050.04012.07
5.3.70.0080.03612.07
5.3.60.0050.04312.06
5.3.50.0130.04012.00
5.3.40.0060.04212.00
5.3.30.0080.04111.94
5.3.20.0040.03711.71
5.3.10.0070.03511.69
5.3.00.0070.03511.68
5.2.170.0060.0349.18
5.2.160.0070.0359.18
5.2.150.0060.0299.18
5.2.140.0040.0309.17
5.2.130.0050.0299.13
5.2.120.0060.0289.13
5.2.110.0060.0309.14
5.2.100.0040.0319.13
5.2.90.0080.0279.13
5.2.80.0060.0299.13
5.2.70.0040.0309.13
5.2.60.0050.0319.08
5.2.50.0030.0329.05
5.2.40.0080.0329.03
5.2.30.0070.0309.00
5.2.20.0050.0309.00
5.2.10.0020.0338.91
5.2.00.0080.0298.77
5.1.60.0040.0258.06
5.1.50.0060.0278.05
5.1.40.0080.0218.04
5.1.30.0030.0288.39
5.1.20.0050.0318.41
5.1.10.0080.0278.14
5.1.00.0040.0278.13
5.0.50.0040.0226.61
5.0.40.0030.0206.47
5.0.30.0060.0346.29
5.0.20.0010.0266.25
5.0.10.0020.0246.23
5.0.00.0060.0366.23
4.4.90.0020.0164.78
4.4.80.0030.0154.75
4.4.70.0040.0144.75
4.4.60.0040.0234.75
4.4.50.0030.0204.77
4.4.40.0030.0244.71
4.4.30.0060.0204.76
4.4.20.0060.0184.84
4.4.10.0040.0244.85
4.4.00.0050.0284.76
4.3.110.0020.0164.66
4.3.100.0030.0154.66
4.3.90.0020.0154.63
4.3.80.0020.0254.59
4.3.70.0020.0154.63
4.3.60.0020.0154.63
4.3.50.0030.0174.62
4.3.40.0020.0244.54
4.3.30.0000.0173.28
4.3.20.0040.0143.26
4.3.10.0030.0183.21
4.3.00.0170.0207.13

preferences:
42.94 ms | 400 KiB | 5 Q