3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 0; $b = &$a; $a++; //unset($a); echo $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)
8.3.60.0110.00418.30
8.3.50.0100.01016.47
8.3.40.0000.01518.62
8.3.30.0110.00718.77
8.3.20.0080.00020.25
8.3.10.0080.00023.60
8.3.00.0050.00319.69
8.2.180.0070.01418.29
8.2.170.0080.00622.96
8.2.160.0070.00718.83
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0060.00319.17
8.2.120.0030.00626.35
8.2.110.0030.00619.31
8.2.100.0000.01118.22
8.2.90.0030.00519.22
8.2.80.0030.00617.97
8.2.70.0040.00817.50
8.2.60.0030.00617.93
8.2.50.0060.00318.10
8.2.40.0030.00620.46
8.2.30.0040.00419.26
8.2.20.0040.00418.18
8.2.10.0000.00718.04
8.2.00.0000.00717.93
8.1.280.0110.00725.92
8.1.270.0040.00422.05
8.1.260.0080.00026.35
8.1.250.0050.00228.09
8.1.240.0090.00023.79
8.1.230.0040.00719.09
8.1.220.0000.00817.74
8.1.210.0000.00918.77
8.1.200.0060.00317.35
8.1.190.0070.00017.22
8.1.180.0040.00418.10
8.1.170.0040.00418.52
8.1.160.0000.00718.98
8.1.150.0070.00018.70
8.1.140.0050.00319.48
8.1.130.0000.01018.73
8.1.120.0030.00417.32
8.1.110.0030.00517.26
8.1.100.0000.00717.28
8.1.90.0000.00717.26
8.1.80.0000.00717.37
8.1.70.0050.00317.39
8.1.60.0050.00317.46
8.1.50.0000.00817.33
8.1.40.0000.00817.47
8.1.30.0000.00817.68
8.1.20.0080.00017.61
8.1.10.0000.00717.51
8.1.00.0040.00417.36
8.0.300.0060.00318.77
8.0.290.0080.00016.75
8.0.280.0030.00318.43
8.0.270.0050.00217.16
8.0.260.0070.00016.81
8.0.250.0030.00316.85
8.0.240.0000.01016.98
8.0.230.0050.00316.80
8.0.220.0030.00316.83
8.0.210.0000.00716.67
8.0.200.0000.00716.90
8.0.190.0070.00016.77
8.0.180.0040.00416.80
8.0.170.0050.00316.73
8.0.160.0000.00816.80
8.0.150.0040.00416.79
8.0.140.0000.00716.75
8.0.130.0000.00513.21
8.0.120.0040.00416.68
8.0.110.0030.00316.81
8.0.100.0070.00016.79
8.0.90.0070.00016.88
8.0.80.0080.00816.84
8.0.70.0000.00716.71
8.0.60.0040.00416.93
8.0.50.0040.00416.79
8.0.30.0140.00516.88
8.0.20.0120.01017.40
8.0.10.0070.00016.96
8.0.00.0100.00716.62
7.4.330.0050.00015.55
7.4.320.0060.00016.48
7.4.300.0000.00616.53
7.4.290.0050.00516.32
7.4.280.0050.00316.40
7.4.270.0000.00716.61
7.4.260.0060.00316.44
7.4.250.0050.00216.29
7.4.240.0030.00416.32
7.4.230.0070.00016.27
7.4.220.0120.00616.55
7.4.210.0050.01516.46
7.4.200.0000.00716.59
7.4.160.0080.01116.53
7.4.150.0100.00717.40
7.4.140.0120.00817.86
7.4.130.0040.01716.26
7.4.120.0120.00716.42
7.4.110.0140.00316.29
7.4.100.0060.01216.58
7.4.90.0030.01616.54
7.4.80.0040.01319.39
7.4.70.0030.01416.42
7.4.60.0030.01516.42
7.4.50.0100.00316.28
7.4.40.0090.00916.52
7.4.30.0120.00316.36
7.4.00.0040.01414.52
7.3.330.0000.00513.14
7.3.320.0000.00612.99
7.3.310.0030.00316.12
7.3.300.0000.00716.22
7.3.290.0060.00916.22
7.3.280.0070.01016.24
7.3.270.0000.01717.40
7.3.260.0110.00516.26
7.3.250.0140.00816.34
7.3.240.0110.01116.37
7.3.230.0120.00916.52
7.3.210.0160.00016.45
7.3.200.0080.00916.26
7.3.190.0000.01616.16
7.3.180.0060.00916.24
7.3.170.0170.00516.18
7.3.160.0080.00816.47
7.2.330.0100.01016.21
7.2.320.0100.01316.70
7.2.310.0130.00316.48
7.2.300.0160.00016.66
7.2.290.0160.00016.42
7.2.60.0070.00716.63
7.2.00.0030.01019.34
7.1.200.0040.01115.50
7.1.100.0030.00818.23
7.1.70.0060.00616.80
7.1.60.0150.00935.05
7.1.50.0180.00634.79
7.1.40.0140.01134.34
7.1.30.0120.01234.45
7.1.20.0190.01134.35
7.1.10.0030.00916.52
7.1.00.0000.01116.43
7.0.200.0000.01116.38
7.0.190.0040.00716.62
7.0.180.0060.00616.04
7.0.170.0040.00715.93
7.0.160.0040.00716.18
7.0.150.0080.00416.21
7.0.140.0040.00816.34
7.0.130.0030.00916.32
7.0.120.0030.00916.31
7.0.110.0080.00316.50
7.0.100.0070.00316.12
7.0.90.0060.00616.14
7.0.80.0040.00816.29
7.0.70.0030.00916.10
7.0.60.0030.00916.04
7.0.50.0040.00816.17
7.0.40.0070.00416.43
7.0.30.0030.00716.56
7.0.20.0030.00916.20
7.0.10.0000.01216.19
7.0.00.0040.00716.20

preferences:
42.98 ms | 400 KiB | 5 Q