3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(isset($var)); $var = null; var_dump(isset($var)); unset($var); var_dump(isset($var)); $var = 1; var_dump(isset($var));

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)
8.3.60.0100.00716.38
8.3.50.0100.00718.17
8.3.40.0080.00818.66
8.3.30.0090.00618.92
8.3.20.0040.00420.31
8.3.10.0090.00023.65
8.3.00.0070.01119.26
8.2.180.0120.00618.25
8.2.170.0160.00022.96
8.2.160.0030.01220.52
8.2.150.0000.00824.18
8.2.140.0070.00024.66
8.2.130.0070.00026.16
8.2.120.0080.00022.10
8.2.110.0030.00622.09
8.2.100.0030.00917.72
8.2.90.0060.00319.03
8.2.80.0000.00917.97
8.2.70.0060.00317.36
8.2.60.0040.00417.90
8.2.50.0000.00818.07
8.2.40.0040.00419.82
8.2.30.0000.00819.60
8.2.20.0050.00317.62
8.2.10.0050.00317.99
8.2.00.0030.00517.48
8.1.270.0080.00023.72
8.1.260.0030.00626.35
8.1.250.0070.00028.09
8.1.240.0040.00423.92
8.1.230.0070.00418.96
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0040.00417.23
8.1.190.0040.00417.09
8.1.180.0090.00018.10
8.1.170.0000.00818.52
8.1.160.0040.00421.94
8.1.150.0070.00418.48
8.1.140.0040.00417.34
8.1.130.0040.00417.82
8.1.120.0050.00217.23
8.1.110.0040.00417.37
8.1.100.0050.00217.39
8.1.90.0040.00417.30
8.1.80.0070.00017.32
8.1.70.0030.00317.41
8.1.60.0000.00717.53
8.1.50.0040.00417.45
8.1.40.0020.00517.43
8.1.30.0000.00817.44
8.1.20.0030.00517.51
8.1.10.0050.00217.47
8.1.00.0000.00817.35
8.0.300.0000.00720.61
8.0.290.0040.00417.05
8.0.280.0000.00818.32
8.0.270.0070.00017.06
8.0.260.0070.00017.15
8.0.250.0030.00316.79
8.0.240.0000.00716.82
8.0.230.0030.00316.87
8.0.220.0000.00716.80
8.0.210.0000.00716.82
8.0.200.0000.00616.80
8.0.190.0070.00016.85
8.0.180.0070.00016.83
8.0.170.0040.00416.89
8.0.160.0040.00416.73
8.0.150.0050.00216.74
8.0.140.0030.00516.81
8.0.130.0000.00613.34
8.0.120.0040.00416.79
8.0.110.0050.00216.77
8.0.100.0050.00216.78
8.0.90.0040.00416.81
8.0.80.0090.01216.76
8.0.70.0000.00716.71
8.0.60.0040.00416.66
8.0.50.0000.00716.81
8.0.30.0100.01016.91
8.0.20.0130.00417.40
8.0.10.0070.00016.82
8.0.00.0100.01116.55
7.4.330.0030.00315.00
7.4.320.0000.00816.33
7.4.300.0000.00616.54
7.4.290.0000.00916.36
7.4.280.0030.00316.42
7.4.270.0000.00716.43
7.4.260.0070.00016.34
7.4.250.0000.00816.50
7.4.240.0050.00216.57
7.4.230.0000.00716.34
7.4.220.0040.01416.55
7.4.210.0060.00816.46
7.4.200.0070.00016.32
7.4.190.0000.00716.30
7.4.160.0060.01116.54
7.4.150.0090.00917.40
7.4.140.0110.00717.86
7.4.130.0090.01116.47
7.4.120.0100.00916.42
7.4.110.0070.01116.43
7.4.100.0040.01516.34
7.4.90.0130.00316.55
7.4.80.0130.00619.39
7.4.70.0120.00316.37
7.4.60.0080.00816.33
7.4.50.0030.00316.52
7.4.40.0090.01516.30
7.4.30.0060.01016.34
7.4.00.0030.01014.77
7.3.330.0050.00213.03
7.3.320.0000.00712.85
7.3.310.0030.00316.22
7.3.300.0030.00316.04
7.3.290.0070.01716.09
7.3.280.0100.00916.12
7.3.270.0090.00917.40
7.3.260.0090.00916.47
7.3.250.0090.00916.45
7.3.240.0070.01316.08
7.3.230.0120.00616.39
7.3.210.0040.01216.52
7.3.200.0130.00519.39
7.3.190.0090.01216.59
7.3.180.0100.00916.20
7.3.170.0060.00916.44
7.3.160.0130.00716.24
7.3.120.0030.01214.95
7.2.330.0180.00716.43
7.2.320.0160.00616.42
7.2.310.0070.01016.55
7.2.300.0120.00616.45
7.2.290.0160.00616.66
7.2.60.0070.00716.86
7.2.00.0040.00819.01
7.1.100.0030.00917.84
7.1.70.0040.00817.21
7.1.60.0110.01519.46
7.1.50.0070.01316.97
7.1.00.0030.07722.30
7.0.200.0000.00716.70
7.0.140.0070.07022.21
7.0.60.0000.04319.96
7.0.50.0070.08017.66
7.0.40.0030.04720.16
7.0.30.0270.05020.34
7.0.20.0270.06720.16
7.0.10.0170.08320.16
7.0.00.0030.05720.08
5.6.280.0070.07020.78
5.6.210.0100.03720.62
5.6.200.0170.06318.21
5.6.190.0030.08320.36
5.6.180.0530.07320.41
5.6.170.0200.03720.38
5.6.160.0100.08020.52
5.6.150.0130.07318.16
5.6.140.0030.04018.18
5.6.130.0100.04718.08
5.6.120.0100.06021.00
5.6.110.0000.09320.97
5.6.100.0070.05020.93
5.6.90.0070.08320.87
5.6.80.0030.03720.52
5.5.350.0300.07020.40
5.5.340.0030.04718.00
5.5.330.0130.06020.08
5.5.320.0100.07320.29
5.5.310.0330.07720.30
5.5.300.0070.07017.95
5.5.290.0100.07318.02
5.5.280.0030.05320.77
5.5.270.0130.04320.88
5.5.260.0130.07320.96
5.5.250.0070.03720.49
5.5.240.0130.07720.21
5.4.450.0670.05719.51
5.4.440.0900.06019.60
5.4.430.1300.05019.51
5.4.420.1070.06019.27
5.4.410.1330.07319.39
5.4.400.0830.05318.80
5.4.390.0870.06019.08
5.4.380.0300.04718.58
5.4.370.0330.05018.62
5.4.360.0200.06718.65
5.4.350.0370.05018.52
5.4.340.0200.06018.68
5.4.320.0040.03812.45
5.4.310.0050.03812.45
5.4.300.0080.04012.45
5.4.290.0120.03912.43
5.4.280.0160.05812.33
5.4.270.0100.05012.33
5.4.260.0160.05612.33
5.4.250.0100.04012.33
5.4.240.0110.03812.33
5.4.230.0130.05312.32
5.4.220.0090.05112.32
5.4.210.0090.04912.32
5.4.200.0110.04412.32
5.4.190.0100.04512.32
5.4.180.0090.05612.32
5.4.170.0210.08912.33
5.4.160.0130.05412.33
5.4.150.0120.06912.32
5.4.140.0070.05712.00
5.4.130.0090.05311.99
5.4.120.0140.06511.95
5.4.110.0100.05111.95
5.4.100.0090.05311.95
5.4.90.0120.05711.95
5.4.80.0160.05311.95
5.4.70.0070.04411.94
5.4.60.0080.03411.94
5.4.50.0150.06311.95
5.4.40.0140.05711.94
5.4.30.0080.05511.93
5.4.20.0090.04211.93
5.4.10.0050.03711.93
5.4.00.0060.03811.42
5.3.290.0100.04512.80
5.3.280.0110.04512.71
5.3.270.0140.04012.72
5.3.260.0100.04012.71
5.3.250.0060.04012.72
5.3.240.0040.04212.72
5.3.230.0160.04612.71
5.3.220.0130.05712.68
5.3.210.0120.05212.68
5.3.200.0130.05412.68
5.3.190.0190.06912.68
5.3.180.0120.06612.67
5.3.170.0140.05712.67
5.3.160.0120.05612.68
5.3.150.0120.05712.68
5.3.140.0110.05812.66
5.3.130.0080.06012.66
5.3.120.0180.06312.66
5.3.110.0140.08412.66
5.3.100.0190.08312.12
5.3.90.0110.03812.09
5.3.80.0090.05012.08
5.3.70.0080.05712.08
5.3.60.0080.05612.06
5.3.50.0060.05512.00
5.3.40.0170.05212.00
5.3.30.0070.06011.94
5.3.20.0140.05211.72
5.3.10.0140.05511.69
5.3.00.0130.06011.68
5.2.170.0080.0509.18
5.2.160.0080.0679.18
5.2.150.0050.0469.17
5.2.140.0280.0639.18
5.2.130.0060.0499.13
5.2.120.0120.0399.13
5.2.110.0060.0479.14
5.2.100.0070.0479.14
5.2.90.0070.0459.14
5.2.80.0090.0569.13
5.2.70.0060.0429.13
5.2.60.0130.0529.09
5.2.50.0070.0439.05
5.2.40.0100.0559.04
5.2.30.0090.0509.01
5.2.20.0070.0439.00
5.2.10.0090.0408.92
5.2.00.0090.0388.78
5.1.60.0060.0388.06
5.1.50.0070.0388.05
5.1.40.0080.0268.04
5.1.30.0060.0338.39
5.1.20.0050.0308.41
5.1.10.0050.0278.13
5.1.00.0050.0318.14
5.0.50.0060.0236.62
5.0.40.0040.0266.47
5.0.30.0050.0316.29
5.0.20.0040.0196.25
5.0.10.0060.0196.24
5.0.00.0080.0346.23
4.4.90.0040.0154.77
4.4.80.0070.0184.75
4.4.70.0050.0204.76
4.4.60.0020.0224.75
4.4.50.0070.0204.77
4.4.40.0040.0394.71
4.4.30.0050.0164.76
4.4.20.0040.0214.85
4.4.10.0060.0214.85
4.4.00.0050.0354.76
4.3.110.0060.0234.67
4.3.100.0060.0174.66
4.3.90.0040.0184.64
4.3.80.0030.0314.58
4.3.70.0050.0204.63
4.3.60.0040.0164.63
4.3.50.0030.0244.62
4.3.40.0040.0324.54
4.3.30.0030.0223.28
4.3.20.0020.0183.26
4.3.10.0040.0163.22
4.3.00.0070.01016.03

preferences:
72.67 ms | 400 KiB | 5 Q