3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = [1, 2, 3]; foreach($b as &$v){ $v = $v*2; unset($v); } var_dump($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)
8.3.60.0100.01016.50
8.3.50.0140.00521.92
8.3.40.0110.00718.67
8.3.30.0070.00718.54
8.3.20.0070.00020.29
8.3.10.0050.00323.66
8.3.00.0080.00419.25
8.2.180.0070.00716.38
8.2.170.0150.00022.96
8.2.160.0140.00020.39
8.2.150.0040.00424.18
8.2.140.0070.00024.66
8.2.130.0060.00317.50
8.2.120.0040.00426.35
8.2.110.0000.00820.47
8.2.100.0000.01218.03
8.2.90.0040.00419.27
8.2.80.0110.00017.97
8.2.70.0030.00617.46
8.2.60.0040.00418.04
8.2.50.0030.00518.07
8.2.40.0060.00319.39
8.2.30.0030.00520.60
8.2.20.0100.00017.68
8.2.10.0000.00718.16
8.2.00.0000.00718.16
8.1.280.0150.00325.92
8.1.270.0090.00023.83
8.1.260.0060.00328.09
8.1.250.0080.00028.09
8.1.240.0080.00024.02
8.1.230.0000.01117.79
8.1.220.0060.00317.76
8.1.210.0040.00418.77
8.1.200.0030.00717.48
8.1.190.0050.00317.35
8.1.180.0080.00018.10
8.1.170.0080.00018.71
8.1.160.0040.00422.07
8.1.150.0000.01018.80
8.1.140.0040.00419.44
8.1.130.0000.00717.60
8.1.120.0050.00317.37
8.1.110.0040.00317.31
8.1.100.0040.00417.36
8.1.90.0040.00417.32
8.1.80.0030.00517.39
8.1.70.0040.00417.27
8.1.60.0000.01017.58
8.1.50.0040.00817.48
8.1.40.0040.00417.56
8.1.30.0030.00617.63
8.1.20.0040.00417.60
8.1.10.0030.00717.53
8.1.00.0040.00417.46
8.0.300.0000.00818.77
8.0.290.0000.00716.75
8.0.280.0040.00418.32
8.0.270.0030.00517.13
8.0.260.0050.00317.25
8.0.250.0030.00316.94
8.0.240.0030.00316.96
8.0.230.0000.00716.85
8.0.220.0070.00016.88
8.0.210.0040.00416.82
8.0.200.0030.00316.84
8.0.190.0070.00016.95
8.0.180.0040.00416.81
8.0.170.0030.00516.96
8.0.160.0050.00316.89
8.0.150.0070.00016.92
8.0.140.0000.00816.79
8.0.130.0000.00613.31
8.0.120.0040.00416.76
8.0.110.0000.00816.89
8.0.100.0040.00416.71
8.0.90.0030.00316.87
8.0.80.0090.00616.79
8.0.70.0080.00016.86
8.0.60.0040.00416.88
8.0.50.0040.00416.77
8.0.30.0080.01017.07
8.0.20.0060.01317.40
8.0.10.0040.00416.99
8.0.00.0050.01216.68
7.4.330.0000.00616.81
7.4.320.0000.00616.50
7.4.300.0000.00616.49
7.4.290.0030.00316.50
7.4.280.0040.00416.48
7.4.270.0030.00316.36
7.4.260.0020.00516.37
7.4.250.0030.00616.64
7.4.240.0030.00416.58
7.4.230.0030.00316.40
7.4.220.0040.01616.60
7.4.210.0060.00916.63
7.4.200.0030.00316.40
7.4.160.0060.01016.42
7.4.150.0110.00617.40
7.4.140.0090.01217.86
7.4.130.0120.00916.48
7.4.120.0120.00516.54
7.4.110.0030.01516.53
7.4.100.0070.01516.53
7.4.90.0060.01216.48
7.4.80.0070.01019.39
7.4.70.0080.01416.45
7.4.60.0130.00616.37
7.4.50.0080.00616.52
7.4.40.0040.01216.65
7.4.30.0130.00416.57
7.4.00.0040.01115.07
7.3.330.0050.00013.15
7.3.320.0020.00213.09
7.3.310.0030.00316.18
7.3.300.0030.00316.25
7.3.290.0030.00316.34
7.3.280.0080.00716.28
7.3.270.0060.01217.40
7.3.260.0040.01216.34
7.3.250.0100.00816.36
7.3.240.0090.01016.32
7.3.230.0030.01416.39
7.3.210.0120.00316.27
7.3.200.0180.00016.63
7.3.190.0070.01016.34
7.3.180.0000.01516.24
7.3.170.0100.00616.27
7.3.160.0070.01016.25
7.2.330.0090.01216.66
7.2.320.0120.01316.81
7.2.310.0060.01216.72
7.2.300.0070.01016.32
7.2.290.0100.01116.52
7.2.60.0030.00616.87
7.2.00.0060.00619.30
7.1.200.0000.01315.73
7.1.100.0060.00618.25
7.1.70.0000.00816.84
7.1.60.0140.01019.48
7.1.50.0090.00916.95
7.1.00.0100.07022.31
7.0.200.0150.00814.86
7.0.100.0130.07720.03
7.0.90.0230.08020.02
7.0.80.0200.06719.82
7.0.70.0100.07319.98
7.0.60.0130.07719.92
7.0.50.0100.08720.36
7.0.40.0030.04320.08
7.0.30.0070.07320.11
7.0.20.0070.08320.17
7.0.10.0070.04020.02
7.0.00.0100.07320.11
5.6.280.0130.03021.13
5.6.250.0070.07320.80
5.6.240.0170.04320.50
5.6.230.0130.07720.59
5.6.220.0070.07720.56
5.6.210.0070.07720.64
5.6.200.0070.08321.02
5.6.190.0170.07320.91
5.6.180.0100.03320.94
5.6.170.0070.04321.05
5.6.160.0100.05721.07
5.6.150.0030.05721.11
5.6.140.0070.06021.16
5.6.130.0000.06021.02
5.6.120.0130.08021.04
5.6.110.0130.06321.07
5.6.100.0170.04021.07
5.6.90.0100.07320.99
5.6.80.0070.04720.55
5.6.70.0000.05320.51
5.6.60.0030.08320.39
5.6.50.0130.07320.49
5.6.40.0030.05020.32
5.6.30.0100.07020.40
5.6.20.0070.06720.29
5.6.10.0100.07020.30
5.6.00.0130.07720.41
5.5.380.0100.08020.33
5.5.370.0170.06320.34
5.5.360.0100.07720.38
5.5.350.0100.07320.39
5.5.340.0100.07720.80
5.5.330.0070.05020.76
5.5.320.0100.08320.73
5.5.310.0030.08320.88
5.5.300.0000.05720.77
5.5.290.0070.08020.82
5.5.280.0100.07720.77
5.5.270.0030.05320.90
5.5.260.0070.05020.91
5.5.250.0130.07320.70
5.5.240.0130.04020.25
5.5.230.0170.06720.11
5.5.220.0130.06320.01
5.5.210.0100.04720.01
5.5.200.0130.07320.27
5.5.190.0170.07020.17
5.5.180.0070.07320.13
5.5.160.0130.06720.13
5.5.150.0070.08020.23
5.5.140.0030.08720.26
5.5.130.0070.07320.15
5.5.120.0100.06720.25
5.5.110.0000.06320.22
5.5.100.0100.06320.17
5.5.90.0070.03720.01
5.5.80.0070.03720.16
5.5.70.0070.07020.16
5.5.60.0130.07020.14
5.5.50.0170.05320.10
5.5.40.0070.04720.11
5.5.30.0070.08020.05
5.5.20.0030.07720.04
5.5.10.0070.04719.97
5.5.00.0100.06320.03

preferences:
57.55 ms | 401 KiB | 5 Q