3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo isset($a) ? $a : 'not set';

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)
8.3.60.0110.00716.63
8.3.50.0140.00516.52
8.3.40.0170.00318.71
8.3.30.0070.00718.46
8.3.20.0040.00418.52
8.3.10.0030.00620.45
8.3.00.0070.00317.50
8.2.180.0100.01016.32
8.2.170.0100.00322.96
8.2.160.0100.00322.25
8.2.150.0000.00724.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00419.76
8.2.110.0060.00320.79
8.2.100.0000.01117.66
8.2.90.0080.00019.23
8.2.80.0060.00317.97
8.2.70.0040.00417.38
8.2.60.0000.00817.93
8.2.50.0040.00418.07
8.2.40.0000.00718.05
8.2.30.0050.00317.89
8.2.20.0070.00017.46
8.2.10.0000.00717.60
8.2.00.0000.00717.54
8.1.280.0100.01025.92
8.1.270.0080.00024.66
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0030.00619.44
8.1.230.0110.00021.03
8.1.220.0040.00418.77
8.1.210.0040.00418.90
8.1.200.0000.01017.10
8.1.190.0040.00417.41
8.1.180.0040.00418.10
8.1.170.0040.00418.79
8.1.160.0000.00718.81
8.1.150.0000.00718.54
8.1.140.0070.00017.32
8.1.130.0070.00017.71
8.1.120.0040.00417.34
8.1.110.0050.00217.24
8.1.100.0000.00817.21
8.1.90.0050.00217.25
8.1.80.0070.00017.25
8.1.70.0040.00417.28
8.1.60.0030.00517.33
8.1.50.0000.00817.22
8.1.40.0050.00217.36
8.1.30.0040.00417.46
8.1.20.0080.00017.45
8.1.10.0060.00317.43
8.1.00.0000.00817.39
8.0.300.0060.00319.90
8.0.290.0070.00016.61
8.0.280.0000.00818.38
8.0.270.0070.00017.18
8.0.260.0000.00616.82
8.0.250.0000.00716.89
8.0.240.0060.00316.94
8.0.230.0030.00316.80
8.0.220.0000.00716.71
8.0.210.0000.00716.65
8.0.200.0000.00716.86
8.0.190.0080.00016.82
8.0.180.0000.00716.77
8.0.170.0040.00416.77
8.0.160.0030.00516.63
8.0.150.0040.00416.76
8.0.140.0000.00816.61
8.0.130.0030.00313.11
8.0.120.0080.00016.61
8.0.110.0070.00016.86
8.0.100.0040.00416.64
8.0.90.0050.00316.76
8.0.80.0070.01016.81
8.0.70.0030.00516.75
8.0.60.0040.00416.57
8.0.50.0040.00416.73
8.0.30.0090.01117.01
8.0.20.0090.00916.80
8.0.10.0000.00716.94
8.0.00.0110.00816.74
7.4.330.0050.00012.75
7.4.320.0040.00416.35
7.4.300.0000.00716.45
7.4.290.0000.00616.27
7.4.280.0030.00616.46
7.4.270.0000.00716.52
7.4.260.0000.00513.25
7.4.250.0070.00316.49
7.4.240.0000.00716.38
7.4.230.0040.00416.39
7.4.220.0100.01616.40
7.4.210.0100.00816.41
7.4.200.0000.00716.54
7.4.190.0000.00716.53
7.4.160.0080.00816.36
7.4.150.0110.00616.36
7.4.140.0120.00516.37
7.4.130.0040.01316.38
7.4.120.0100.00616.40
7.4.110.0100.00716.36
7.4.100.0110.00516.48
7.4.90.0070.01016.48
7.4.80.0120.00616.48
7.4.70.0080.00816.20
7.4.60.0140.00316.36
7.4.50.0060.00016.17
7.4.40.0000.01216.22
7.4.30.0100.00716.47
7.4.00.0040.01214.77
7.3.330.0000.00612.89
7.3.320.0030.00313.03
7.3.310.0000.00716.18
7.3.300.0030.00316.16
7.3.290.0030.01416.12
7.3.280.0090.00916.06
7.3.270.0150.00316.43
7.3.260.0060.01316.27
7.3.250.0090.01016.27
7.3.240.0100.00616.47
7.3.230.0130.00316.12
7.3.210.0130.00616.46
7.3.200.0160.00619.39
7.3.190.0130.00716.34
7.3.180.0150.00016.27
7.3.170.0130.00616.25
7.3.160.0100.00716.05
7.3.120.0040.00814.90
7.3.10.0140.00016.36
7.3.00.0060.00916.13
7.2.330.0100.01016.57
7.2.320.0070.01116.56
7.2.310.0060.01516.23
7.2.300.0090.01416.49
7.2.290.0140.00316.37
7.2.130.0070.00716.39
7.2.120.0130.00316.35
7.2.110.0120.00616.08
7.2.100.0080.00816.33
7.2.90.0110.00616.48
7.2.80.0120.00316.42
7.2.70.0110.00715.96
7.2.60.0280.00716.42
7.2.50.0150.00516.42
7.2.40.0140.00715.93
7.2.30.0120.00316.28
7.2.20.0190.00316.12
7.2.10.0060.00616.06
7.2.00.0060.01016.77
7.1.250.0140.00315.36
7.1.200.0040.00815.45
7.1.70.0030.00716.65
7.1.60.0130.01019.40
7.1.50.0260.01034.76
7.1.00.0070.06022.28
7.0.200.0190.00614.66
7.0.140.0000.07321.95
7.0.120.0130.05022.15
7.0.60.0070.08319.85
7.0.50.0170.06717.77
7.0.40.0170.08020.04
7.0.30.0300.03320.30
7.0.20.0300.06320.19
7.0.10.0100.07020.04
7.0.00.0100.08020.16
5.6.280.0100.08721.11
5.6.210.0100.07720.72
5.6.200.0130.05718.18
5.6.190.0200.03720.77
5.6.180.0270.07320.36
5.6.170.0130.05720.61
5.6.160.0100.08020.52
5.6.150.0100.06018.21
5.6.140.0100.06018.18
5.6.130.0070.03718.07
5.6.120.0170.07321.02
5.6.110.0100.06720.88
5.6.100.0170.08020.95
5.6.90.0170.07321.07
5.6.80.0130.07720.39
5.5.350.0370.06720.43
5.5.340.0030.05717.91
5.5.330.0070.08320.25
5.5.320.0270.03020.31
5.5.310.0270.03720.20
5.5.300.0070.07717.91
5.5.290.0030.04017.95
5.5.280.0070.09320.87
5.5.270.0170.08020.83
5.5.260.0030.08720.86
5.5.250.0030.05320.48
5.5.240.0030.07720.13
5.4.450.0000.04319.50
5.4.440.0070.04319.51
5.4.430.0030.04019.11
5.4.420.0130.04019.50
5.4.410.0030.05319.37
5.4.400.0100.07018.79
5.4.390.0030.04018.79
5.4.380.0030.04718.91
5.4.370.0130.07319.08
5.4.360.0070.04718.97
5.4.350.0070.07019.12
5.4.340.0070.04019.16
5.4.320.0130.03019.09
5.4.310.0000.04019.18
5.4.300.0030.04019.15
5.4.290.0100.05018.79
5.4.280.0170.07019.16
5.4.270.0100.07719.07
5.4.260.0030.04319.18
5.4.250.0130.07018.80
5.4.240.0030.06719.16
5.4.230.0200.06318.78
5.4.220.0070.04319.04
5.4.210.0100.07019.16
5.4.200.0070.04719.11
5.4.190.0100.08019.14
5.4.180.0170.06318.78
5.4.170.0030.04018.80
5.4.160.0130.05719.12
5.4.150.0030.04319.14
5.4.140.0070.06716.44
5.4.130.0030.07716.33
5.4.120.0070.04316.16
5.4.110.0030.05016.27
5.4.100.0030.07716.40
5.4.90.0100.06316.24
5.4.80.0130.07016.36
5.4.70.0100.04316.22
5.4.60.0070.05716.32
5.4.50.0100.04316.20
5.4.40.0030.04016.33
5.4.30.0230.02716.12
5.4.20.0070.04716.36
5.4.10.0130.06716.24
5.4.00.0070.06015.74
5.3.290.0030.04714.75
5.3.280.0030.06714.54
5.3.270.0000.06314.52
5.3.260.0030.04014.42
5.3.250.0070.03714.54
5.3.240.0100.04714.55
5.3.230.0000.04314.53
5.3.220.0030.07714.44
5.3.210.0000.04714.48
5.3.200.0170.06314.65
5.3.190.0170.03314.65
5.3.180.0070.03714.50
5.3.170.0070.06714.49
5.3.160.0000.05014.51
5.3.150.0130.03014.50
5.3.140.0070.06314.51
5.3.130.0070.04014.42
5.3.120.0170.02714.52
5.3.110.0170.04014.33
5.3.100.0170.05314.02
5.3.90.0030.04013.90
5.3.80.0070.07313.80
5.3.70.0030.04713.80
5.3.60.0030.08013.92
5.3.50.0000.06013.78
5.3.40.0100.03713.89
5.3.30.0070.04313.88
5.3.20.0000.05313.65
5.3.10.0170.05713.49
5.3.00.0030.06313.58
5.2.170.0000.04711.15
5.2.160.0070.03311.14
5.2.150.0030.03311.07
5.2.140.0130.03311.13
5.2.130.0070.03011.04
5.2.120.0000.06011.10
5.2.110.0070.04311.07
5.2.100.0070.03711.03
5.2.90.0030.04710.99
5.2.80.0000.03311.02
5.2.70.0030.06311.26
5.2.60.0030.04011.04
5.2.50.0030.06011.00
5.2.40.0000.03010.96
5.2.30.0030.06010.92
5.2.20.0030.03710.89
5.2.10.0030.04010.74
5.2.00.0100.02710.74
5.1.60.0070.0339.98
5.1.50.0000.04010.06
5.1.40.0070.0239.81
5.1.30.0070.04010.38
5.1.20.0000.03010.23
5.1.10.0070.02710.04
5.1.00.0000.04010.21
5.0.50.0070.0438.58
5.0.40.0030.0238.39
5.0.30.0070.0638.20
5.0.20.0030.0478.20
5.0.10.0030.0208.33
5.0.00.0000.0478.12
4.4.90.0070.0277.93
4.4.80.0070.0207.93
4.4.70.0000.0307.93
4.4.60.0000.0207.93
4.4.50.0030.0207.93
4.4.40.0070.0437.93
4.4.30.0030.0177.93
4.4.20.0000.0177.93
4.4.10.0030.0177.93
4.4.00.0030.0237.93
4.3.110.0000.0207.93
4.3.100.0000.0237.93
4.3.90.0030.0307.93
4.3.80.0000.0507.93
4.3.70.0030.0137.93
4.3.60.0000.0177.93
4.3.50.0000.0277.93
4.3.40.0000.0577.93
4.3.30.0000.0177.93
4.3.20.0000.0177.93
4.3.10.0030.0177.93
4.3.00.0000.0177.93

preferences:
42.64 ms | 400 KiB | 5 Q