3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ 1 => ["key" => "a"], 2 => ["key" => "b"] ]; foreach ($arr as $key => &$val) { $arr[$val["key"]] = $val; unset($arr[$key]); } var_dump($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)
8.3.70.0030.01216.63
8.3.60.0090.00918.56
8.3.50.0170.00521.26
8.3.40.0070.01018.62
8.3.30.0140.00718.85
8.3.20.0060.00320.19
8.3.10.0050.00323.66
8.3.00.0030.00522.57
8.2.190.0090.00616.58
8.2.180.0070.01416.38
8.2.170.0090.00622.96
8.2.160.0100.00719.37
8.2.150.0120.00324.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0070.00019.89
8.2.110.0030.00619.33
8.2.100.0030.00917.63
8.2.90.0040.00419.36
8.2.80.0040.00417.97
8.2.70.0050.00517.63
8.2.60.0080.00017.93
8.2.50.0040.00418.07
8.2.40.0000.00821.01
8.2.30.0030.00517.99
8.2.20.0050.00317.74
8.2.10.0000.00818.06
8.2.00.0040.00418.13
8.1.280.0100.00725.92
8.1.270.0040.00420.20
8.1.260.0090.00026.35
8.1.250.0110.00328.09
8.1.240.0030.00622.67
8.1.230.0040.00817.42
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00617.35
8.1.190.0080.00017.22
8.1.180.0040.00418.10
8.1.170.0090.00018.65
8.1.160.0040.00423.86
8.1.150.0000.00718.77
8.1.140.0080.00017.35
8.1.130.0070.00017.70
8.1.120.0070.00017.30
8.1.110.0000.00717.46
8.1.100.0000.00717.43
8.1.90.0040.00417.49
8.1.80.0050.00217.41
8.1.70.0030.00317.33
8.1.60.0000.01117.40
8.1.50.0040.00417.58
8.1.40.0040.00417.39
8.1.30.0050.00317.54
8.1.20.0000.00817.63
8.1.10.0000.00717.48
8.1.00.0030.00617.42
8.0.300.0030.00618.77
8.0.290.0020.00516.75
8.0.280.0070.00018.36
8.0.270.0070.00016.73
8.0.260.0030.00317.30
8.0.250.0000.00716.97
8.0.240.0040.00416.90
8.0.230.0080.00016.96
8.0.220.0070.00016.77
8.0.210.0000.00716.95
8.0.200.0000.00716.91
8.0.190.0000.00916.98
8.0.180.0040.00416.92
8.0.170.0000.00716.90
8.0.160.0080.00017.02
8.0.150.0050.00216.84
8.0.140.0000.00716.87
8.0.130.0000.00513.32
8.0.120.0000.00816.74
8.0.110.0070.00016.86
8.0.100.0000.00916.75
8.0.90.0000.00816.73
8.0.80.0070.01016.94
8.0.70.0040.00416.92
8.0.60.0060.00316.90
8.0.50.0070.00016.86
8.0.30.0030.01317.12
8.0.20.0070.01217.40
8.0.10.0070.00016.99
8.0.00.0090.01016.67
7.4.330.0000.00515.15
7.4.320.0000.00716.58
7.4.300.0000.00716.50
7.4.290.0060.00316.50
7.4.280.0080.00016.59
7.4.270.0000.00816.48
7.4.260.0000.00716.48
7.4.250.0040.00416.47
7.4.240.0020.00516.56
7.4.230.0000.00716.60
7.4.220.0030.00316.34
7.4.210.0120.00616.62
7.4.200.0050.00216.24
7.4.160.0040.01116.54
7.4.150.0090.00917.40
7.4.140.0120.00817.86
7.4.130.0070.01216.43
7.4.120.0130.00816.54
7.4.110.0100.00616.63
7.4.100.0110.00716.50
7.4.90.0110.00716.45
7.4.80.0130.00719.39
7.4.70.0070.01416.39
7.4.60.0060.00916.55
7.4.50.0040.00416.21
7.4.40.0100.00716.48
7.4.30.0050.01116.35
7.4.00.0090.00614.78
7.3.330.0000.00513.16
7.3.320.0020.00213.30
7.3.310.0000.00716.38
7.3.300.0040.00416.34
7.3.290.0060.00916.30
7.3.280.0100.00816.31
7.3.270.0090.01517.40
7.3.260.0090.00916.37
7.3.250.0090.00816.41
7.3.240.0110.00616.54
7.3.230.0200.00316.41
7.3.210.0140.00316.40
7.3.200.0100.01019.39
7.3.190.0140.00316.42
7.3.180.0100.00616.41
7.3.170.0070.01116.41
7.3.160.0100.00716.35
7.2.330.0070.01016.70
7.2.320.0030.02016.49
7.2.310.0060.01116.77
7.2.300.0060.01216.62
7.2.290.0060.01116.75
7.2.00.0060.00618.99
7.1.100.0110.00418.04
7.1.70.0070.00317.22
7.1.60.0070.01820.03
7.1.50.0000.01616.90
7.1.00.0100.07022.41
7.0.200.0180.00416.64
7.0.60.0070.08019.93
7.0.50.0030.08717.86
7.0.40.0070.04320.40
7.0.30.0230.09320.45
7.0.20.0300.07020.09
7.0.10.0100.04720.16
7.0.00.0130.05320.16
5.6.280.0000.07320.98
5.6.210.0170.06720.59
5.6.200.0130.07718.23
5.6.190.0100.08320.41
5.6.180.2630.03320.35
5.6.170.0270.05020.51
5.6.160.0200.05320.49
5.6.150.0030.04018.08
5.6.140.0100.08318.15
5.6.130.0170.07018.16
5.6.120.0100.08020.98
5.6.110.0030.07021.08
5.6.100.0100.04720.93
5.6.90.0070.08320.96
5.6.80.0130.06720.42
5.5.350.0230.08020.43
5.5.340.0070.08317.89
5.5.330.0000.05320.21
5.5.320.0430.07320.18
5.5.310.0430.07320.28
5.5.300.0030.04317.95
5.5.290.0130.08017.98
5.5.280.0170.06720.87
5.5.270.0130.07720.88
5.5.260.0070.07020.79
5.5.250.0230.06320.68
5.5.240.2830.04020.07
5.4.450.0300.06719.45
5.4.440.0200.05319.48
5.4.430.0230.07019.52
5.4.420.0130.06719.52
5.4.410.0200.04719.32
5.4.400.0270.04019.20
5.4.390.0170.06019.00
5.4.380.0370.05718.99
5.4.370.0430.04319.27
5.4.360.0300.04719.12
5.4.350.0270.06719.10
5.4.340.0130.06019.14
5.4.320.0200.05319.10
5.4.310.0130.05719.19
5.4.300.0230.04318.77
5.4.290.0270.05319.15
5.4.280.0170.06319.14
5.4.270.0170.07018.79
5.4.260.0200.06318.79
5.4.250.0270.06318.89
5.4.240.0130.05719.15
5.4.230.0130.05719.07
5.4.220.0100.06719.28
5.4.210.0230.05019.24
5.4.200.0200.04716.71
5.4.190.0270.04319.25
5.4.180.0170.05318.93
5.4.170.0230.05019.15
5.4.160.0070.06318.92
5.4.150.0130.05718.93
5.4.140.0170.05016.33
5.4.130.0130.05316.37
5.4.120.0130.05316.43
5.4.110.0200.04716.43
5.4.100.0130.06016.37
5.4.90.0200.05016.59
5.4.80.0230.06016.20
5.4.70.0130.07716.30
5.4.60.0170.04316.41
5.4.50.0000.07316.04
5.4.40.0270.06716.36
5.4.30.0270.04316.27
5.4.20.0230.04016.38

preferences:
56.81 ms | 401 KiB | 5 Q