3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['a','b','c','d','e','f']; $res = array(); $size = count($arr); for($i=$size-1;$i>=0;$i--){ $arr[$size] = $arr[$i]; unset($arr[$i]); $size++; } var_dump($arr);

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)
8.4.140.0120.00917.32
8.4.130.0140.00617.54
8.4.120.0120.00720.47
8.4.110.0100.01122.40
8.4.100.0110.01017.64
8.4.90.0140.00718.58
8.4.80.0060.00517.81
8.4.70.0120.00917.78
8.4.60.0120.00820.72
8.4.50.0140.00819.32
8.4.40.0090.00619.45
8.4.30.0060.01317.55
8.4.20.0120.00917.54
8.4.10.0030.00619.42
8.3.270.0080.01116.90
8.3.260.0050.00316.74
8.3.250.0100.00819.13
8.3.240.0080.00816.35
8.3.230.0120.00616.50
8.3.220.0130.00617.20
8.3.210.0120.00716.69
8.3.200.0070.00216.66
8.3.190.0090.00619.16
8.3.180.0060.00416.64
8.3.170.0110.00719.19
8.3.160.0120.00616.57
8.3.150.0030.00520.81
8.3.140.0080.00017.20
8.3.130.0060.00918.57
8.3.120.0040.00420.83
8.3.110.0060.00320.94
8.3.100.0130.00616.53
8.3.90.0110.00426.77
8.3.80.0060.00318.43
8.3.70.0090.00616.75
8.3.60.0100.01016.63
8.3.50.0060.01018.30
8.3.40.0070.00718.81
8.3.30.0060.00918.54
8.3.20.0080.00020.39
8.3.10.0070.00021.92
8.3.00.0070.00023.61
8.2.290.0040.00620.27
8.2.280.0070.00118.45
8.2.270.0070.01117.04
8.2.260.0040.00418.77
8.2.250.0080.00818.36
8.2.240.0040.00418.77
8.2.230.0000.00822.58
8.2.220.0000.00924.06
8.2.210.0100.00726.77
8.2.200.0060.00318.41
8.2.190.0060.01016.75
8.2.180.0100.01018.11
8.2.170.0080.00622.96
8.2.160.0000.01320.46
8.2.150.0040.00425.66
8.2.140.0030.00524.66
8.2.130.0040.00419.33
8.2.120.0070.00026.35
8.2.110.0080.00321.12
8.2.100.0120.00017.72
8.2.90.0060.00319.21
8.2.80.0000.00817.97
8.2.70.0060.00317.63
8.2.60.0000.00918.03
8.2.50.0050.00218.10
8.2.40.0040.00420.42
8.2.30.0030.00619.31
8.2.20.0080.00018.13
8.2.10.0000.00818.11
8.2.00.0040.00418.12
8.1.330.0110.00321.79
8.1.320.0110.00916.27
8.1.310.0000.00816.81
8.1.300.0080.00817.85
8.1.290.0050.00530.84
8.1.280.0100.00725.92
8.1.270.0080.00023.88
8.1.260.0050.00326.35
8.1.250.0050.00228.09
8.1.240.0140.00322.19
8.1.230.0000.01120.85
8.1.220.0040.00417.78
8.1.210.0050.00318.88
8.1.200.0060.00317.36
8.1.190.0030.00617.35
8.1.180.0040.00418.10
8.1.170.0080.00018.51
8.1.160.0000.00718.93
8.1.150.0050.00220.15
8.1.140.0000.00819.64
8.1.130.0000.00720.86
8.1.120.0080.00017.43
8.1.110.0080.00017.41
8.1.100.0030.00617.43
8.1.90.0000.00917.35
8.1.80.0000.00717.51
8.1.70.0000.00717.47
8.1.60.0000.00717.59
8.1.50.0060.00317.42
8.1.40.0020.00517.40
8.1.30.0040.00417.63
8.1.20.0050.00217.55
8.1.10.0040.00417.58
8.1.00.0040.00417.34
8.0.300.0000.00720.09
8.0.290.0000.00816.63
8.0.280.0070.00018.37
8.0.270.0030.00317.18
8.0.260.0000.00718.38
8.0.250.0030.00316.99
8.0.240.0000.00716.77
8.0.230.0030.00316.91
8.0.220.0000.00716.80
8.0.210.0030.00316.85
8.0.200.0070.00016.86
8.0.190.0070.00016.79
8.0.180.0040.00416.74
8.0.170.0080.00016.84
8.0.160.0070.00016.89
8.0.150.0050.00216.91
8.0.140.0000.00716.83
8.0.130.0030.00313.33
8.0.120.0040.00416.75
8.0.110.0070.00016.82
8.0.100.0050.00316.76
8.0.90.0040.00416.70
8.0.80.0060.00916.85
8.0.70.0040.00416.79
8.0.60.0000.00716.78
8.0.50.0000.00716.83
8.0.30.0100.00717.06
8.0.20.0100.00917.40
8.0.10.0040.00416.86
8.0.00.0140.00416.62
7.4.330.0040.00415.55
7.4.320.0000.00716.41
7.4.300.0030.00316.59
7.4.290.0070.00016.65
7.4.280.0000.00816.43
7.4.270.0050.00216.52
7.4.260.0000.00816.43
7.4.250.0050.00416.61
7.4.240.0000.00716.63
7.4.230.0000.00716.39
7.4.220.0110.01416.68
7.4.210.0030.01116.42
7.4.200.0000.00716.64
7.4.160.0080.00916.56
7.4.150.0090.00917.40
7.4.140.0070.01017.86
7.4.130.0090.00916.52
7.4.120.0090.00816.50
7.4.110.0120.00616.43
7.4.100.0090.00916.46
7.4.90.0080.00816.43
7.4.80.0120.00619.39
7.4.70.0090.00916.46
7.4.60.0120.00816.37
7.4.50.0040.01516.30
7.4.40.0040.01616.35
7.4.30.0090.00916.50
7.4.00.0030.01314.75
7.3.330.0020.00213.06
7.3.320.0060.00013.08
7.3.310.0070.00016.23
7.3.300.0000.00716.29
7.3.290.0030.01116.34
7.3.280.0090.00816.34
7.3.270.0060.01117.40
7.3.260.0110.01316.62
7.3.250.0110.00616.46
7.3.240.0090.01016.40
7.3.230.0140.00316.47
7.3.210.0110.00816.34
7.3.200.0100.01316.55
7.3.190.0040.01216.25
7.3.180.0100.00616.44
7.3.170.0060.00916.38
7.3.160.0100.00616.34
7.2.330.0040.01716.76
7.2.320.0090.00916.40
7.2.310.0090.00916.71
7.2.300.0130.00316.81
7.2.290.0060.01116.47
7.2.60.0100.00616.82
7.1.200.0000.01315.99
7.1.90.0000.01817.80
7.1.80.0030.01218.11
7.1.70.0140.00417.33
7.1.60.0310.00735.02
7.1.50.0220.00634.72
7.1.40.0180.00734.33
7.1.30.0170.01034.43
7.1.20.0230.00334.54
7.1.10.0080.00816.64
7.1.00.0060.00616.46
7.0.230.0070.00717.67
7.0.220.0000.01217.82
7.0.210.0060.01116.42
7.0.200.0080.00816.83
7.0.190.0040.00816.43
7.0.180.0000.01216.34
7.0.170.0090.00316.21
7.0.160.0060.00916.06
7.0.150.0060.00616.22
7.0.140.0080.00416.53
7.0.130.0030.00916.53
7.0.120.0030.00916.50
7.0.110.0000.01216.39
7.0.100.0000.01216.25
7.0.90.0000.01216.44
7.0.80.0060.00616.63
7.0.70.0000.01316.28
7.0.60.0120.00016.06
7.0.50.0080.00416.30
7.0.40.0090.00316.43
7.0.30.0070.00716.55
7.0.20.0060.00616.51
7.0.10.0080.00416.37
7.0.00.0080.00416.48

preferences:
31.56 ms | 403 KiB | 5 Q