3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; $foo2 = array_combine(array_keys($foo), array_keys($foo)); var_dump($foo2); $foo3 = array_map(function($v) { return '#' . $v; }, $foo2); var_dump($foo3); $foo4 = array_combine($foo3, $foo); var_dump($foo4);

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)
8.3.60.0040.01116.63
8.3.50.0160.00722.91
8.3.40.0150.00418.60
8.3.30.0140.00018.86
8.3.20.0050.00320.21
8.3.10.0030.00623.36
8.3.00.0060.00317.63
8.2.180.0100.00716.75
8.2.170.0090.00622.96
8.2.160.0140.00020.43
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00420.94
8.2.110.0090.00021.17
8.2.100.0040.00717.78
8.2.90.0030.00517.59
8.2.80.0000.00917.97
8.2.70.0040.00417.63
8.2.60.0040.00418.04
8.2.50.0000.00918.07
8.2.40.0000.00818.28
8.2.30.0040.00418.06
8.2.20.0040.00417.63
8.2.10.0050.00218.00
8.2.00.0040.00417.80
8.1.280.0070.01125.92
8.1.270.0060.00323.82
8.1.260.0000.00726.35
8.1.250.0000.00728.09
8.1.240.0040.00422.59
8.1.230.0040.00820.97
8.1.220.0030.00517.77
8.1.210.0060.00318.90
8.1.200.0090.00317.23
8.1.190.0000.00817.23
8.1.180.0030.00518.10
8.1.170.0000.00818.46
8.1.160.0040.00422.02
8.1.150.0040.00418.80
8.1.140.0000.00817.46
8.1.130.0000.00717.84
8.1.120.0050.00217.53
8.1.110.0030.00617.36
8.1.100.0040.00417.44
8.1.90.0080.00017.43
8.1.80.0080.00017.47
8.1.70.0000.00717.32
8.1.60.0040.00417.59
8.1.50.0000.00717.43
8.1.40.0040.00417.35
8.1.30.0050.00317.66
8.1.20.0080.00017.71
8.1.10.0040.00417.44
8.1.00.0000.00817.46
8.0.300.0000.00819.98
8.0.290.0050.00216.75
8.0.280.0030.00318.34
8.0.270.0000.00717.29
8.0.260.0030.00317.25
8.0.250.0030.00316.98
8.0.240.0070.00016.84
8.0.230.0070.00016.88
8.0.220.0000.00716.82
8.0.210.0070.00016.76
8.0.200.0000.00616.91
8.0.190.0070.00016.97
8.0.180.0030.00716.88
8.0.170.0040.00416.92
8.0.160.0070.00016.89
8.0.150.0040.00416.88
8.0.140.0040.00416.80
8.0.130.0030.00313.27
8.0.120.0050.00316.84
8.0.110.0040.00416.77
8.0.100.0040.00416.90
8.0.90.0050.00316.76
8.0.80.0070.01116.83
8.0.70.0000.00816.71
8.0.60.0080.00016.97
8.0.50.0000.00716.79
8.0.30.0150.00717.19
8.0.20.0080.01517.40
8.0.10.0000.00816.91
8.0.00.0120.00516.86
7.4.330.0060.00015.04
7.4.320.0030.00316.50
7.4.300.0060.00016.50
7.4.290.0000.00716.63
7.4.280.0000.00816.34
7.4.270.0000.00716.59
7.4.260.0000.00716.43
7.4.250.0040.00416.44
7.4.240.0030.00316.52
7.4.230.0030.00316.54
7.4.220.0100.00716.46
7.4.210.0000.01616.53
7.4.200.0000.00816.69
7.4.160.0060.01116.28
7.4.150.0060.01317.40
7.4.140.0120.00617.86
7.4.130.0080.01216.72
7.4.120.0120.00416.57
7.4.110.0030.01316.46
7.4.100.0160.00616.36
7.4.90.0090.00916.45
7.4.80.0130.00419.39
7.4.70.0120.00916.46
7.4.60.0170.00016.39
7.4.50.0040.00416.22
7.4.40.0150.00916.53
7.4.30.0130.00916.56
7.4.00.0000.01115.20
7.3.330.0070.00013.30
7.3.320.0000.00513.29
7.3.310.0030.00316.33
7.3.300.0000.00716.17
7.3.290.0060.01216.32
7.3.280.0070.00916.28
7.3.270.0100.01017.40
7.3.260.0130.01116.30
7.3.240.0120.00616.26
7.3.230.0100.00916.55
7.3.210.0130.00416.36
7.3.200.0180.00519.39
7.3.190.0130.00316.55
7.3.180.0070.01116.26
7.3.170.0130.00316.34
7.3.160.0110.00816.21
7.2.330.0140.00316.50
7.2.320.0120.00616.68
7.2.310.0130.00316.29
7.2.300.0190.00016.46
7.2.290.0190.00316.63
7.1.100.0060.00618.14
7.1.70.0000.01217.31
7.1.60.0070.01719.40
7.1.50.0120.00616.96
7.1.00.0100.07022.30
7.0.200.0030.00316.79
7.0.140.0030.05022.00
7.0.60.0070.07719.92
7.0.50.0030.04017.95
7.0.40.0000.08720.19
7.0.30.0430.05020.26
7.0.20.0270.06020.07
7.0.10.0300.05320.10
7.0.00.0170.06020.08
5.6.280.0030.07321.10
5.6.210.0070.08020.60
5.6.200.0100.04318.18
5.6.190.0130.06320.77
5.6.180.0070.05020.49
5.6.170.0130.04320.56
5.6.160.0070.04720.57
5.6.150.0100.07718.22
5.6.140.0070.06318.28
5.6.130.0000.04318.17
5.6.120.0100.04020.99
5.6.110.0100.03321.01
5.6.100.0130.08021.00
5.6.90.0030.07720.96
5.6.80.0130.07020.51
5.6.70.0270.04320.37
5.5.350.0230.06020.42
5.5.340.0130.07018.09
5.5.330.0030.08020.27
5.5.320.0430.04320.47
5.5.310.0270.04720.24
5.5.300.0030.07717.99
5.5.290.0070.09018.01
5.5.280.0100.07720.77
5.5.270.0000.09720.77
5.5.260.0100.06720.87
5.5.250.0100.08020.69
5.5.240.0030.08020.26
5.4.450.0770.05319.70
5.4.440.0730.06319.16
5.4.430.0830.04719.58
5.4.420.0800.05319.16
5.4.410.0100.06319.00
5.4.400.0270.05718.73
5.4.390.0400.05318.54
5.4.380.0030.06018.84
5.4.370.0000.06718.74
5.4.360.0100.05718.54
5.4.350.0190.10712.02
5.4.340.0040.04112.02
5.4.320.0070.03612.50
5.4.310.0090.04512.50
5.4.300.0040.04012.50
5.4.290.0040.04112.50
5.4.280.0090.03312.39
5.4.270.0050.03712.39
5.4.260.0060.03812.39
5.4.250.0070.05112.39
5.4.240.0070.03512.39
5.4.230.0070.03712.39
5.4.220.0070.03612.39
5.4.210.0060.03512.39
5.4.200.0040.04012.39
5.4.190.0070.03512.38
5.4.180.0020.04012.39
5.4.170.0050.03712.39
5.4.160.0030.03912.39
5.4.150.0090.03412.38
5.4.140.0060.03712.07
5.4.130.0080.04612.06
5.4.120.0070.03512.02
5.4.110.0060.03612.01
5.4.100.0030.03912.02
5.4.90.0050.03812.02
5.4.80.0050.03712.01
5.4.70.0070.03412.01
5.4.60.0080.03212.01
5.4.50.0050.03612.01
5.4.40.0060.03511.99
5.4.30.0090.03512.00
5.4.20.0120.03712.00
5.4.10.0090.04612.00
5.4.00.0100.03311.48
5.3.290.0030.04312.80
5.3.280.0070.03812.71
5.3.270.0090.03712.73
5.3.260.0050.04012.72
5.3.250.0050.03712.72
5.3.240.0080.04212.72
5.3.230.0050.03912.71
5.3.220.0050.03812.68
5.3.210.0100.03612.68
5.3.200.0060.03912.68
5.3.190.0070.03912.68
5.3.180.0060.03612.68
5.3.170.0080.03512.66
5.3.160.0010.04212.67
5.3.150.0070.03712.67
5.3.140.0060.03712.66
5.3.130.0050.04412.66
5.3.120.0050.04012.65
5.3.110.0050.04012.66
5.3.100.0040.03912.12
5.3.90.0050.03812.08
5.3.80.0070.04012.07
5.3.70.0040.03812.07
5.3.60.0090.03512.07
5.3.50.0050.03812.00
5.3.40.0080.03412.00
5.3.30.0060.04211.95
5.3.20.0050.03511.73
5.3.10.0080.03211.70
5.3.00.0050.03611.69
5.2.170.0030.0329.18
5.2.160.0030.0319.18
5.2.150.0050.0309.18
5.2.140.0050.0299.18
5.2.130.0050.0289.14
5.2.120.0030.0309.13
5.2.110.0050.0299.14
5.2.100.0060.0289.14
5.2.90.0090.0289.14
5.2.80.0050.0359.14
5.2.70.0040.0309.14
5.2.60.0050.0299.09
5.2.50.0050.0309.06
5.2.40.0040.0309.03
5.2.30.0040.0329.02
5.2.20.0070.0279.00
5.2.10.0050.0288.93
5.2.00.0050.0288.79
5.1.60.0050.0238.06
5.1.50.0050.0308.06
5.1.40.0050.0258.05
5.1.30.0030.0308.40
5.1.20.0030.0318.42
5.1.10.0040.0348.14
5.1.00.0050.0248.14
5.0.50.0070.0226.63
5.0.40.0030.0286.48
5.0.30.0030.0326.29
5.0.20.0030.0196.27
5.0.10.0040.0216.23
5.0.00.0030.0346.23
4.4.90.0020.0164.78
4.4.80.0030.0154.76
4.4.70.0040.0144.75
4.4.60.0030.0154.75
4.4.50.0020.0164.77
4.4.40.0030.0244.71
4.4.30.0050.0174.76
4.4.20.0040.0144.85
4.4.10.0030.0154.85
4.4.00.0030.0254.76
4.3.110.0030.0154.67
4.3.100.0030.0214.67
4.3.90.0050.0144.64
4.3.80.0040.0234.58
4.3.70.0040.0134.63
4.3.60.0020.0154.63
4.3.50.0030.0154.63
4.3.40.0020.0254.54
4.3.30.0020.0163.29
4.3.20.0020.0163.25
4.3.10.0030.0153.22
4.3.00.0170.0177.93

preferences:
49.06 ms | 401 KiB | 5 Q