3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = NULL; if (is_null($x)) echo "x is null\n"; if (isset($x)) echo "x is set\n";

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)
8.3.40.0090.00618.77
8.3.30.0070.00718.46
8.3.20.0040.00418.95
8.3.10.0070.00021.63
8.3.00.0040.00420.52
8.2.170.0090.00622.96
8.2.160.0030.01222.08
8.2.150.0050.00324.18
8.2.140.0030.00624.66
8.2.130.0040.00419.77
8.2.120.0040.00426.35
8.2.110.0030.00620.87
8.2.100.0070.00418.03
8.2.90.0040.00417.75
8.2.80.0040.00419.02
8.2.70.0040.00417.91
8.2.60.0050.00318.20
8.2.50.0050.00318.10
8.2.40.0030.00619.43
8.2.30.0000.00719.05
8.2.20.0080.00018.01
8.2.10.0060.00317.98
8.2.00.0060.00317.51
8.1.270.0000.00820.59
8.1.260.0080.00026.35
8.1.250.0030.00628.09
8.1.240.0030.00623.94
8.1.230.0070.00418.75
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0040.00417.13
8.1.190.0040.00417.11
8.1.180.0050.00318.10
8.1.170.0030.00618.46
8.1.160.0070.00018.73
8.1.150.0040.00418.72
8.1.140.0000.00722.06
8.1.130.0000.00620.20
8.1.120.0000.00817.28
8.1.110.0080.00017.40
8.1.100.0050.00317.39
8.1.90.0000.00717.37
8.1.80.0060.00317.31
8.1.70.0030.00517.34
8.1.60.0000.00817.44
8.1.50.0000.00817.32
8.1.40.0000.00817.46
8.1.30.0040.00417.49
8.1.20.0000.00817.58
8.1.10.0040.00417.49
8.1.00.0050.00317.32
8.0.300.0040.00418.77
8.0.290.0070.00016.63
8.0.280.0000.00718.38
8.0.270.0000.00717.17
8.0.260.0000.00618.42
8.0.250.0000.00716.80
8.0.240.0040.00416.89
8.0.230.0000.00716.80
8.0.220.0000.00716.73
8.0.210.0030.00316.74
8.0.200.0040.00416.86
8.0.190.0030.00316.84
8.0.180.0000.00816.89
8.0.170.0060.00316.84
8.0.160.0040.00416.79
8.0.150.0040.00416.73
8.0.140.0030.00316.82
8.0.130.0000.00613.27
8.0.120.0040.00416.68
8.0.110.0000.00716.81
8.0.100.0070.00016.88
8.0.90.0070.00016.81
8.0.80.0090.00616.80
8.0.70.0040.00416.74
8.0.60.0040.00416.66
8.0.50.0030.00516.69
8.0.30.0130.00817.05
8.0.20.0070.01317.40
8.0.10.0070.00016.77
8.0.00.0110.00916.66
7.4.330.0020.00215.55
7.4.320.0000.00616.51
7.4.300.0030.00316.53
7.4.290.0030.00316.42
7.4.280.0030.00616.33
7.4.270.0000.00716.55
7.4.260.0040.00416.50
7.4.250.0080.00016.40
7.4.240.0000.00816.35
7.4.230.0040.00416.48
7.4.220.0000.00716.52
7.4.210.0090.00516.53
7.4.200.0030.00316.36
7.4.160.0080.01016.37
7.4.140.0080.01117.86
7.4.130.0140.00316.42
7.4.120.0080.00816.39
7.4.110.0100.01316.38
7.4.100.0090.00616.33
7.4.90.0090.00916.40
7.4.80.0130.00919.39
7.4.70.0120.00416.44
7.4.60.0090.00816.27
7.4.50.0080.00316.50
7.4.40.0120.00416.33
7.3.330.0000.00512.93
7.3.320.0050.00012.88
7.3.310.0050.00316.24
7.3.300.0070.00016.14
7.3.290.0030.00316.15
7.3.280.0130.00416.11
7.3.260.0120.00816.18
7.3.240.0110.00716.27
7.3.230.0070.01116.15
7.3.210.0110.00715.92
7.3.200.0080.00816.58
7.3.190.0150.00616.36
7.3.180.0080.00816.04
7.3.170.0100.00716.20
7.3.160.0130.00316.18
7.2.330.0070.01016.44
7.2.320.0160.00616.64
7.2.310.0030.01416.57
7.2.300.0100.00616.45
7.2.290.0080.00816.57

preferences:
56.18 ms | 400 KiB | 5 Q