3v4l.org

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

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)
8.3.60.0130.00416.50
8.3.50.0190.00317.19
8.3.40.0040.01118.51
8.3.30.0140.00018.42
8.3.20.0080.00018.51
8.3.10.0080.00018.65
8.3.00.0040.00419.13
8.2.180.0170.00316.38
8.2.170.0100.00622.96
8.2.160.0100.00618.79
8.2.150.0000.00824.18
8.2.140.0090.00024.66
8.2.130.0070.00026.16
8.2.120.0050.00320.97
8.2.110.0040.00722.20
8.2.100.0090.00317.78
8.2.90.0030.00619.02
8.2.80.0100.00017.97
8.2.70.0050.00317.38
8.2.60.0040.00417.90
8.2.50.0000.00717.68
8.2.40.0040.00419.35
8.2.30.0040.00417.48
8.2.20.0060.00317.61
8.2.10.0040.00417.70
8.2.00.0040.00417.61
8.1.280.0110.00425.92
8.1.270.0110.00723.99
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0040.00420.95
8.1.230.0100.00017.64
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0030.00617.35
8.1.190.0040.00417.23
8.1.180.0050.00318.75
8.1.170.0080.00017.62
8.1.160.0000.00719.00
8.1.150.0040.00418.54
8.1.140.0030.00617.47
8.1.130.0040.00419.11
8.1.120.0050.00217.44
8.1.110.0040.00417.19
8.1.100.0080.00017.28
8.1.90.0020.00517.40
8.1.80.0040.00417.37
8.1.70.0030.00317.34
8.1.60.0000.00817.41
8.1.50.0000.00717.28
8.1.40.0040.00417.40
8.1.30.0040.00417.47
8.1.20.0000.00717.43
8.1.10.0000.00717.43
8.1.00.0000.00717.36
8.0.300.0000.00718.77
8.0.290.0080.00016.60
8.0.280.0070.00018.55
8.0.270.0070.00017.10
8.0.260.0060.00016.66
8.0.250.0000.00716.82
8.0.240.0050.00216.79
8.0.230.0000.00716.80
8.0.220.0000.00616.82
8.0.210.0030.00316.84
8.0.200.0050.00516.88
8.0.190.0050.00316.88
8.0.180.0000.00816.73
8.0.170.0040.00416.75
8.0.160.0030.00316.83
8.0.150.0080.00016.80
8.0.140.0050.00316.65
8.0.130.0060.00013.24
8.0.120.0040.00416.83
8.0.110.0050.00316.77
8.0.100.0000.00816.66
8.0.90.0040.00416.86
8.0.80.0040.01116.85
8.0.70.0000.00816.88
8.0.60.0000.00716.63
8.0.50.0000.00816.68
8.0.30.0120.00617.12
8.0.20.0110.00916.90
8.0.10.0030.00516.84
8.0.00.0150.00316.70
7.4.330.0040.00012.82
7.4.320.0000.00716.57
7.4.300.0030.00316.41
7.4.290.0060.00316.50
7.4.280.0040.00416.53
7.4.270.0060.00016.51
7.4.260.0030.00313.10
7.4.250.0040.00416.45
7.4.240.0030.00316.42
7.4.230.0000.00716.32
7.4.220.0040.01416.52
7.4.210.0200.00016.61
7.4.200.0040.00416.27
7.4.190.0030.00616.62
7.4.160.0060.01016.38
7.4.150.0060.01016.25
7.4.140.0130.00417.86
7.4.130.0140.00716.37
7.4.120.0030.01316.24
7.4.110.0150.00316.19
7.4.100.0030.01316.32
7.4.90.0120.00816.41
7.4.80.0150.00919.39
7.4.70.0110.00616.39
7.4.60.0130.00316.23
7.4.50.0000.00416.24
7.4.40.0030.01216.09
7.4.30.0090.00816.42
7.4.00.0090.00614.69
7.3.330.0000.00612.88
7.3.320.0030.00312.89
7.3.310.0050.00216.24
7.3.300.0000.00716.11
7.3.290.0070.01016.15
7.3.280.0120.00416.14
7.3.270.0090.00916.31
7.3.260.0120.00616.35
7.3.240.0140.00316.21
7.3.230.0030.01316.11
7.3.210.0030.01316.23
7.3.200.0130.00316.36
7.3.190.0130.00716.50
7.3.180.0070.00816.06
7.3.170.0080.00916.30
7.3.160.0070.00716.07
7.3.120.0040.00714.51
7.3.10.0070.00716.67
7.3.00.0080.00316.73
7.2.330.0080.00816.37
7.2.320.0060.01516.50
7.2.310.0030.01316.33
7.2.300.0060.01016.32
7.2.290.0130.00316.48
7.2.130.0060.00916.53
7.2.120.0110.00316.55
7.2.110.0050.00516.68
7.2.100.0100.00316.65
7.2.90.0110.00716.94
7.2.80.0080.00816.77
7.2.70.0030.00716.87
7.2.60.0060.00916.67
7.2.50.0070.00316.68
7.2.40.0070.00716.76
7.2.30.0090.00316.82
7.2.20.0070.00816.49
7.2.10.0030.00916.37
7.2.00.0050.00817.85
7.1.250.0090.00015.42
7.1.100.0080.00317.91
7.1.70.0000.00817.02
7.1.60.0040.01219.25
7.1.50.0110.01116.87
7.1.00.0030.03322.43
7.0.200.0080.00416.43
7.0.140.0170.06322.18
7.0.120.0070.07021.96
7.0.60.0070.07319.89
7.0.50.0030.04017.73
7.0.40.0100.09020.23
7.0.30.0130.05020.21
7.0.20.0270.06020.33
7.0.10.0100.08320.16
7.0.00.0200.07720.00
5.6.280.0130.06320.84
5.6.210.0070.04720.68
5.6.200.0000.09018.16
5.6.190.0100.07020.63
5.6.180.0370.04320.56
5.6.170.0330.06720.49
5.6.160.0100.07720.33
5.6.150.0030.07318.22
5.6.140.0100.07018.11
5.6.130.0070.04018.17
5.6.120.0100.08021.12
5.6.110.0100.07721.02
5.6.100.0170.07320.97
5.6.90.0170.06721.00
5.6.80.0000.08720.36
5.5.350.0170.04020.29
5.5.340.0070.05318.04
5.5.330.0070.08020.40
5.5.320.0170.09320.20
5.5.310.0270.06320.27
5.5.300.0130.05018.00
5.5.290.0130.07017.94
5.5.280.0030.09020.76
5.5.270.0100.05320.82
5.5.260.0030.09020.71
5.5.250.0100.04320.54
5.5.240.0100.06320.05
5.4.450.0700.04319.25
5.4.440.0630.04719.27
5.4.430.0670.03319.25
5.4.420.0300.03719.39
5.4.410.0230.04319.12
5.4.400.0930.03718.71
5.4.390.0730.04318.81
5.4.380.0600.03318.98
5.4.370.0570.03718.75
5.4.360.0500.03718.75
5.4.350.0870.03318.93
5.4.340.0470.04319.09
5.4.320.0470.03318.83
5.4.310.0400.04019.14
5.4.300.0430.04319.17
5.4.290.0570.03318.74
5.4.280.0830.03319.04
5.4.270.0200.04718.96
5.4.260.0800.03318.98
5.4.250.0700.04719.05
5.4.240.0670.05018.96
5.4.230.0730.04718.96
5.4.220.0530.05018.80
5.4.210.0800.03018.93
5.4.200.0100.05018.86
5.4.190.0530.04719.16
5.4.180.0470.04318.73
5.4.170.0500.08018.70
5.4.160.0500.04718.79
5.4.150.0730.03018.90
5.4.140.0700.04016.28
5.4.130.0300.04316.26
5.4.120.0570.04016.44
5.4.110.0600.04716.17
5.4.100.0670.04016.46
5.4.90.0600.03716.22
5.4.80.0600.04016.44
5.4.70.0530.03716.19
5.4.60.0630.04016.35
5.4.50.0530.04016.38
5.4.40.0430.04016.14
5.4.30.0670.04016.40
5.4.20.0470.04016.34
5.4.10.0630.03716.38
5.4.00.0530.02715.89
5.3.290.0300.04014.61
5.3.280.0630.03014.45
5.3.270.0470.04014.46
5.3.260.0700.03314.54
5.3.250.0570.05714.45
5.3.240.0800.03314.47
5.3.230.0700.03314.45
5.3.220.0730.04314.51
5.3.210.0800.03014.41
5.3.200.0800.06714.61
5.3.190.0600.04014.52
5.3.180.0670.02314.57
5.3.170.1000.03714.60
5.3.160.0870.03714.41
5.3.150.0630.03314.52
5.3.140.0630.03314.64
5.3.130.0630.04014.55
5.3.120.0970.03314.59
5.3.110.0800.03014.49
5.3.100.0700.02714.05
5.3.90.0670.03313.87
5.3.80.0730.03314.13
5.3.70.0600.03313.96
5.3.60.0900.02013.87
5.3.50.0800.03013.84
5.3.40.0700.03013.89
5.3.30.0800.03314.00
5.3.20.0800.03313.59
5.3.10.0900.03713.60
5.3.00.0000.03713.68
5.2.170.0000.02710.98
5.2.160.0500.03311.16
5.2.150.0630.02011.08
5.2.140.0470.03010.98
5.2.130.0430.03311.11
5.2.120.0530.03311.05
5.2.110.0670.04311.14
5.2.100.0570.02310.93
5.2.90.0770.04010.94
5.2.80.0700.03711.02
5.2.70.0670.06310.95
5.2.60.0830.03010.89
5.2.50.0500.03010.95
5.2.40.0530.02310.92
5.2.30.0670.02710.82
5.2.20.0530.02310.82
5.2.10.0430.04010.88
5.2.00.0330.04010.60
5.1.60.0530.0279.96
5.1.50.0330.02710.07
5.1.40.0400.02310.09
5.1.30.0270.02710.49
5.1.20.0500.02310.28
5.1.10.0400.0479.99
5.1.00.0470.03010.22
5.0.50.0270.0238.71
5.0.40.0370.0378.42
5.0.30.0270.0308.21
5.0.20.0200.0208.18
5.0.10.0300.0208.06
5.0.00.0470.0478.06
4.4.90.0200.0177.94
4.4.80.0300.0177.93
4.4.70.0030.0207.86
4.4.60.0400.0107.86
4.4.50.0170.0207.85
4.4.40.0070.0307.81
4.4.30.0130.0237.81
4.4.20.0000.0177.52
4.4.10.0130.0177.50
4.4.00.0300.0277.50
4.3.110.0270.0207.50
4.3.100.0300.0107.49
4.3.90.0270.0137.46
4.3.80.0370.0277.43
4.3.70.0330.0137.43
4.3.60.0270.0137.43
4.3.50.0170.0177.43
4.3.40.0000.0277.43
4.3.30.0200.0307.43
4.3.20.0130.0137.43
4.3.10.0170.0137.43
4.3.00.0170.0207.14

preferences:
55.91 ms | 401 KiB | 5 Q