3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; $foo2 = array_combine($foo, $foo); $foo3 = array_map(function($v) { return '#' . $v; }, $foo2); $foo4 = array_fill_keys($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)
8.3.60.0110.00418.43
8.3.50.0070.00720.07
8.3.40.0150.00418.85
8.3.30.0030.01218.92
8.3.20.0040.00420.16
8.3.10.0080.00023.61
8.3.00.0080.00019.26
8.2.180.0150.00416.50
8.2.170.0070.00722.96
8.2.160.0030.01020.32
8.2.150.0040.00424.18
8.2.140.0060.00324.66
8.2.130.0040.00426.16
8.2.120.0060.00320.90
8.2.110.0040.00820.52
8.2.100.0100.00317.91
8.2.90.0000.00819.22
8.2.80.0040.00417.97
8.2.70.0050.00317.63
8.2.60.0100.00317.68
8.2.50.0060.00318.07
8.2.40.0040.00418.22
8.2.30.0040.00418.07
8.2.20.0000.00717.74
8.2.10.0040.00418.08
8.2.00.0070.00017.64
8.1.270.0050.00323.92
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0030.01622.48
8.1.230.0060.00620.97
8.1.220.0050.00318.77
8.1.210.0030.00618.82
8.1.200.0040.00417.35
8.1.190.0050.00317.35
8.1.180.0040.00418.10
8.1.170.0030.00618.59
8.1.160.0000.00721.90
8.1.150.0000.00819.01
8.1.140.0070.00017.38
8.1.130.0030.00317.71
8.1.120.0000.00717.36
8.1.110.0000.00717.47
8.1.100.0020.00517.46
8.1.90.0000.00717.50
8.1.80.0000.00717.52
8.1.70.0030.00317.41
8.1.60.0000.00817.64
8.1.50.0050.00317.36
8.1.40.0000.00817.43
8.1.30.0030.00617.64
8.1.20.0050.00317.64
8.1.10.0080.00017.55
8.1.00.0030.00617.40
8.0.300.0000.00720.02
8.0.290.0090.00016.63
8.0.280.0090.00018.44
8.0.270.0000.00817.18
8.0.260.0000.00717.21
8.0.250.0030.00316.93
8.0.240.0000.00816.93
8.0.230.0070.00016.95
8.0.220.0030.00316.86
8.0.210.0060.00016.77
8.0.200.0000.00616.99
8.0.190.0030.00316.96
8.0.180.0000.00716.94
8.0.170.0000.00816.91
8.0.160.0040.00416.87
8.0.150.0040.00416.90
8.0.140.0050.00216.88
8.0.130.0080.00013.25
8.0.120.0000.00816.87
8.0.110.0040.00416.90
8.0.100.0040.00416.86
8.0.90.0000.00716.89
8.0.80.0100.00716.84
8.0.70.0040.00416.95
8.0.60.0000.00716.86
8.0.50.0040.00417.00
8.0.30.0060.01817.01
8.0.20.0110.00717.40
8.0.10.0070.00017.01
8.0.00.0090.01116.81
7.4.330.0050.00015.00
7.4.320.0030.00316.43
7.4.300.0030.00316.55
7.4.290.0000.00716.55
7.4.280.0040.00416.46
7.4.270.0040.00416.48
7.4.260.0050.00216.60
7.4.250.0000.00816.57
7.4.240.0040.00416.54
7.4.230.0000.00716.70
7.4.220.0090.00916.57
7.4.210.0120.00916.64
7.4.200.0070.00016.66
7.4.160.0080.00816.59
7.4.150.0200.00717.40
7.4.140.0130.00617.86
7.4.130.0090.00816.49
7.4.120.0100.00616.39
7.4.110.0070.01616.35
7.4.100.0070.01016.53
7.4.90.0060.01316.42
7.4.80.0110.00719.39
7.4.70.0090.01216.39
7.4.60.0090.00916.49
7.4.50.0000.00816.64
7.4.40.0090.00916.29
7.4.30.0070.01416.32
7.4.00.0030.00915.07
7.3.330.0030.00413.16
7.3.320.0050.00013.29
7.3.310.0060.00016.16
7.3.300.0030.00316.26
7.3.290.0060.01216.29
7.3.280.0090.00716.24
7.3.270.0070.01017.40
7.3.260.0140.00316.33
7.3.250.0160.00616.40
7.3.240.0090.01116.54
7.3.230.0100.00716.39
7.3.210.0170.00316.34
7.3.200.0140.00819.39
7.3.190.0070.01016.61
7.3.180.0090.00816.58
7.3.170.0130.00316.37
7.3.160.0110.00516.31
7.3.120.0100.00714.29
7.3.110.0120.00414.56
7.3.100.0040.01214.85
7.3.90.0070.01414.54
7.3.80.0090.00314.99
7.3.70.0000.00914.80
7.3.60.0030.01014.71
7.3.50.0080.00414.64
7.3.40.0060.00914.84
7.3.30.0000.01614.57
7.3.20.0090.00616.53
7.3.10.0090.00616.36
7.3.00.0070.00716.55
7.2.330.0170.00916.73
7.2.320.0060.01216.72
7.2.310.0050.01316.69
7.2.300.0210.00016.74
7.2.290.0120.00916.32
7.2.250.0110.00314.52
7.2.240.0100.01015.14
7.2.230.0030.00914.93
7.2.220.0110.00714.65
7.2.210.0060.01314.91
7.2.200.0030.01015.11
7.2.190.0100.00314.89
7.2.180.0060.00914.97
7.2.170.0000.01515.05
7.2.110.0110.00616.70
7.2.60.0060.00616.86
7.2.00.0030.01019.05
7.1.330.0080.00815.86
7.1.320.0100.00715.80
7.1.310.0060.00615.72
7.1.300.0130.00015.48
7.1.290.0000.01415.39
7.1.280.0000.01415.80
7.1.270.0060.00915.73
7.1.260.0030.01215.68
7.1.200.0030.01015.82
7.1.100.0000.01518.34
7.1.70.0030.00317.28
7.1.60.0130.00319.40
7.1.50.0120.00417.04
7.1.00.0030.07722.40
7.0.200.0040.00416.79
7.0.140.0030.05021.96
7.0.60.0030.06019.92
7.0.50.0030.04017.98
7.0.40.0070.08320.08
7.0.30.0300.08020.17
7.0.20.0300.08020.09
7.0.10.0270.05020.24
7.0.00.0100.08320.08
5.6.280.0030.07321.15
5.6.210.0070.04320.47
5.6.200.0070.04318.18
5.6.190.0100.08720.57
5.6.180.0070.07720.75
5.6.170.0230.03320.39
5.6.160.0170.08320.44
5.6.150.0070.06718.26
5.6.140.0070.03718.28
5.6.130.0070.03718.14
5.6.120.0130.08320.99
5.6.110.0070.04021.02
5.6.100.0130.05721.09
5.6.90.0100.06020.88
5.6.80.0200.07320.38
5.6.70.0230.08320.39
5.5.350.0300.07320.34
5.5.340.0100.08018.09
5.5.330.0100.08020.33
5.5.320.0370.04320.41
5.5.310.0330.08020.32
5.5.300.0030.04318.02
5.5.290.0030.09017.92
5.5.280.0100.06320.77
5.5.270.0130.06020.71
5.5.260.0170.07320.65
5.5.250.0070.07720.62
5.5.240.0100.07720.29
5.4.450.0630.05719.49
5.4.440.0570.08019.61
5.4.430.0730.08319.47
5.4.420.0670.06719.63
5.4.410.0070.05718.86
5.4.400.0270.05018.76
5.4.390.0470.04318.72
5.4.380.0170.05018.53
5.4.370.0130.04718.57
5.4.360.0170.04718.84
5.4.350.0120.07212.02
5.4.340.0120.04212.02
5.4.320.0090.03512.50
5.4.310.0060.03712.50
5.4.300.0040.03912.51
5.4.290.0100.03312.50
5.4.280.0060.03612.39
5.4.270.0100.04212.40
5.4.260.0030.04012.39
5.4.250.0070.04112.39
5.4.240.0060.03512.39
5.4.230.0060.03612.38
5.4.220.0070.03412.39
5.4.210.0050.03612.39
5.4.200.0130.03512.39
5.4.190.0050.03812.38
5.4.180.0050.03712.39
5.4.170.0050.03712.39
5.4.160.0060.03512.39
5.4.150.0060.03512.39
5.4.140.0050.03812.07
5.4.130.0060.03512.06
5.4.120.0080.03312.02
5.4.110.0050.03712.01
5.4.100.0060.04212.02
5.4.90.0090.03912.01
5.4.80.0080.03612.01
5.4.70.0080.03212.01
5.4.60.0080.03212.01
5.4.50.0060.04012.01
5.4.40.0040.04112.00
5.4.30.0030.03711.99
5.4.20.0020.03711.99
5.4.10.0050.03412.00
5.4.00.0060.03411.48
5.3.290.0060.03912.80
5.3.280.0070.03912.71
5.3.270.0040.03912.72
5.3.260.0050.03812.72
5.3.250.0060.03612.72
5.3.240.0080.03512.72
5.3.230.0030.03912.71
5.3.220.0090.03712.68
5.3.210.0050.03912.68
5.3.200.0060.03512.68
5.3.190.0040.04512.68
5.3.180.0030.03912.68
5.3.170.0050.03612.67
5.3.160.0050.03712.68
5.3.150.0080.03812.67
5.3.140.0060.03512.66
5.3.130.0060.03812.66
5.3.120.0060.03812.66
5.3.110.0040.03912.66
5.3.100.0050.03612.12
5.3.90.0050.03612.09
5.3.80.0040.03712.07
5.3.70.0040.03712.08
5.3.60.0060.03512.06
5.3.50.0070.03412.00
5.3.40.0090.04212.00
5.3.30.0070.03911.95
5.3.20.0060.03411.72
5.3.10.0050.03511.70
5.3.00.0030.03811.68
5.2.170.0030.0319.18
5.2.160.0040.0309.18
5.2.150.0070.0289.18
5.2.140.0090.0299.18
5.2.130.0050.0299.14
5.2.120.0040.0289.14
5.2.110.0040.0299.14
5.2.100.0100.0329.14
5.2.90.0080.0259.14
5.2.80.0030.0319.14
5.2.70.0050.0299.14
5.2.60.0070.0309.09
5.2.50.0070.0349.05
5.2.40.0060.0269.04
5.2.30.0050.0329.02
5.2.20.0070.0279.01
5.2.10.0040.0348.93
5.2.00.0030.0348.78
5.1.60.0080.0198.07
5.1.50.0060.0218.06
5.1.40.0070.0298.05
5.1.30.0050.0258.40
5.1.20.0050.0328.42
5.1.10.0070.0368.14
5.1.00.0040.0258.14
5.0.50.0030.0206.63
5.0.40.0010.0216.48
5.0.30.0030.0316.29
5.0.20.0020.0206.27
5.0.10.0020.0216.24
5.0.00.0010.0326.23
4.4.90.0020.0164.78
4.4.80.0030.0144.75
4.4.70.0040.0144.75
4.4.60.0030.0184.75
4.4.50.0050.0134.77
4.4.40.0060.0244.71
4.4.30.0030.0154.76
4.4.20.0050.0204.84
4.4.10.0010.0214.85
4.4.00.0070.0204.75
4.3.110.0040.0164.67
4.3.100.0010.0174.66
4.3.90.0040.0134.63
4.3.80.0020.0244.58
4.3.70.0030.0144.63
4.3.60.0020.0154.63
4.3.50.0060.0144.63
4.3.40.0010.0244.54
4.3.30.0020.0153.29
4.3.20.0040.0143.25
4.3.10.0010.0203.22
4.3.00.0070.0236.96

preferences:
52.61 ms | 400 KiB | 5 Q