3v4l.org

run code in 300+ PHP versions simultaneously
<?php function flatten($arr) { $result = []; foreach ($arr as $key => $value) { if (is_array($value)) { foreach (flatten($value) as $subKey => $scalar) { $result[$key . ':' . $subKey] = $scalar; } } else if (is_scalar($value)) { $result[$key] = $value; } } return $result; } var_dump(flatten(['foo' => 123, 'bar' => 456])); var_dump(flatten(['foo' => ['bar' => 123, 'baz' => ['letsgo' => 'deeper']]]));

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)
8.3.60.0140.00316.75
8.3.50.0110.00622.03
8.3.40.0120.00618.85
8.3.30.0070.00719.04
8.3.20.0040.00420.34
8.3.10.0080.00023.51
8.3.00.0000.00722.50
8.2.180.0200.00318.13
8.2.170.0140.00322.96
8.2.160.0100.00322.19
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0000.00726.16
8.2.120.0040.00422.13
8.2.110.0000.00922.06
8.2.100.0030.00917.97
8.2.90.0040.00419.22
8.2.80.0000.00817.97
8.2.70.0030.00617.75
8.2.60.0040.00418.05
8.2.50.0030.00518.07
8.2.40.0000.00918.34
8.2.30.0000.00718.20
8.2.20.0000.00817.65
8.2.10.0040.00417.67
8.2.00.0040.00417.82
8.1.280.0070.01025.92
8.1.270.0050.00323.97
8.1.260.0050.00326.35
8.1.250.0000.00728.09
8.1.240.0060.00323.76
8.1.230.0040.00819.06
8.1.220.0000.00817.74
8.1.210.0030.00518.77
8.1.200.0100.00017.35
8.1.190.0040.00417.52
8.1.180.0000.00818.10
8.1.170.0030.00518.64
8.1.160.0040.00422.06
8.1.150.0040.00418.63
8.1.140.0080.00017.45
8.1.130.0070.00017.82
8.1.120.0000.00717.49
8.1.110.0040.00417.42
8.1.100.0000.00717.36
8.1.90.0060.00317.49
8.1.80.0030.00317.35
8.1.70.0000.00717.36
8.1.60.0000.00817.63
8.1.50.0080.00017.52
8.1.40.0000.00817.43
8.1.30.0000.00817.57
8.1.20.0030.00517.62
8.1.10.0000.00717.59
8.1.00.0040.00417.40
8.0.300.0040.00418.77
8.0.290.0030.00317.05
8.0.280.0030.00318.43
8.0.270.0000.00717.23
8.0.260.0000.00616.81
8.0.250.0030.00316.89
8.0.240.0000.00716.97
8.0.230.0030.00317.00
8.0.220.0070.00016.78
8.0.210.0090.00016.88
8.0.200.0000.00617.02
8.0.190.0000.00817.02
8.0.180.0000.00816.95
8.0.170.0000.00716.93
8.0.160.0070.00016.89
8.0.150.0040.00416.88
8.0.140.0040.00416.76
8.0.130.0000.00513.29
8.0.120.0030.00616.84
8.0.110.0040.00416.91
8.0.100.0030.00516.92
8.0.90.0070.00016.75
8.0.80.0120.00616.79
8.0.70.0000.00716.72
8.0.60.0040.00417.00
8.0.50.0000.00716.83
8.0.30.0090.01217.24
8.0.20.0060.01317.40
8.0.10.0000.00717.00
8.0.00.0140.00516.89
7.4.330.0050.00015.09
7.4.320.0000.00616.49
7.4.300.0070.00016.44
7.4.290.0030.00716.51
7.4.280.0000.00716.58
7.4.270.0000.01016.61
7.4.260.0000.00716.55
7.4.250.0040.00416.60
7.4.240.0020.00616.51
7.4.230.0030.00316.43
7.4.220.0070.01016.44
7.4.210.0070.01016.59
7.4.200.0030.00316.49
7.4.190.0000.00716.66
7.4.160.0100.00616.32
7.4.150.0120.00617.40
7.4.140.0120.01117.86
7.4.130.0130.00516.52
7.4.120.0080.00916.44
7.4.110.0030.01416.54
7.4.100.0210.00316.66
7.4.90.0150.00316.43
7.4.80.0060.01119.39
7.4.70.0080.00816.52
7.4.60.0040.01216.46
7.4.50.0000.00816.44
7.4.40.0000.01422.77
7.4.30.0060.01116.66
7.4.00.0060.01215.08
7.3.330.0050.00213.34
7.3.320.0060.00013.33
7.3.310.0030.00316.26
7.3.300.0070.00016.40
7.3.290.0040.01116.35
7.3.280.0080.00916.34
7.3.270.0100.00717.40
7.3.260.0150.01116.57
7.3.250.0060.01116.49
7.3.240.0160.00716.34
7.3.230.0030.01316.64
7.3.210.0110.00616.28
7.3.200.0120.00619.39
7.3.190.0060.01516.45
7.3.180.0070.01016.67
7.3.170.0080.00816.45
7.3.160.0110.00516.66
7.3.120.0040.01114.71
7.3.10.0030.00616.25
7.3.00.0030.01316.60
7.2.330.0120.00616.70
7.2.320.0110.01116.51
7.2.310.0150.00616.74
7.2.300.0130.00716.63
7.2.290.0070.01016.45
7.2.130.0130.00616.52
7.2.120.0080.00516.68
7.2.110.0070.01016.38
7.2.100.0110.00816.69
7.2.90.0130.01016.57
7.2.80.0070.00717.01
7.2.70.0150.00316.54
7.2.60.0040.01416.83
7.2.50.0130.00816.59
7.2.40.0110.00716.61
7.2.30.0150.01116.73
7.2.20.0030.01216.71
7.2.10.0030.00616.67
7.2.00.0030.01018.01
7.1.250.0000.01215.37
7.1.200.0060.00315.88
7.1.100.0000.01117.82
7.1.70.0040.00417.18
7.1.60.0070.01819.29
7.1.50.0090.01616.63
7.1.00.0000.08022.24
7.0.200.0090.00616.82
7.0.140.0030.07322.11
7.0.60.0030.04019.97
7.0.50.0030.04317.88
7.0.40.0070.08320.15
7.0.30.0270.06020.16
7.0.20.0330.07320.24
7.0.10.0200.08320.13
7.0.00.0030.08720.25
5.6.280.0000.07720.99
5.6.210.0100.05020.48
5.6.200.0070.07718.27
5.6.190.0070.08720.39
5.6.180.0070.08020.79
5.6.170.0230.04320.50
5.6.160.0130.08020.70
5.6.150.0030.06718.27
5.6.140.0030.04018.12
5.6.130.0030.04018.29
5.6.120.0100.06721.00
5.6.110.0130.07321.03
5.6.100.0000.09021.07
5.6.90.0170.07321.04
5.6.80.0000.07320.41
5.6.70.0330.05720.38
5.5.350.0100.06320.38
5.5.340.0130.07717.99
5.5.330.0070.04020.55
5.5.320.0030.04020.35
5.5.310.0270.03020.35
5.5.300.0100.04017.98
5.5.290.0070.08017.95
5.5.280.0070.03720.65
5.5.270.0130.07320.64
5.5.260.0100.08020.76
5.5.250.0170.06020.68
5.5.240.0170.07020.16
5.4.450.0870.05019.64
5.4.440.0600.06019.20
5.4.430.0830.06319.47
5.4.420.0670.05719.16
5.4.410.0200.06718.69
5.4.400.0100.05318.79
5.4.390.0000.06318.57
5.4.380.0100.05718.76
5.4.370.0130.05718.58
5.4.360.0200.05018.78
5.4.350.0270.06318.77
5.4.340.0170.05318.51
5.4.320.0070.03412.50
5.4.310.0070.04112.50
5.4.300.0070.03712.50
5.4.290.0070.03712.50
5.4.280.0060.05212.38
5.4.270.0210.06612.37
5.4.260.0090.07312.37
5.4.250.0100.06312.37
5.4.240.0200.08512.37
5.4.230.0090.07012.36
5.4.220.0170.05112.36
5.4.210.0200.05412.36
5.4.200.0120.05912.36
5.4.190.0100.06312.36
5.4.180.0140.05212.36
5.4.170.0190.04812.37
5.4.160.0140.04812.36
5.4.150.0170.04712.36
5.4.140.0180.04912.04
5.4.130.0100.05512.03
5.4.120.0090.05311.99
5.4.110.0100.05311.98
5.4.100.0110.05011.99
5.4.90.0120.05711.98
5.4.80.0120.06011.98
5.4.70.0060.06111.98
5.4.60.0140.04911.98
5.4.50.0130.04811.98
5.4.40.0110.04011.97
5.4.30.0100.04611.96
5.4.20.0110.05611.97
5.4.10.0110.06111.97
5.4.00.0080.05211.46
5.3.290.0050.03812.80
5.3.280.0070.05612.71
5.3.270.0100.05412.73
5.3.260.0100.05712.72
5.3.250.0100.05512.71
5.3.240.0120.05212.72
5.3.230.0150.04812.71
5.3.220.0110.05512.68
5.3.210.0100.05612.68
5.3.200.0270.07412.68
5.3.190.0120.04612.68
5.3.180.0100.04912.67
5.3.170.0080.05212.66
5.3.160.0090.05112.67
5.3.150.0060.05512.67
5.3.140.0060.05212.66
5.3.130.0080.05412.66
5.3.120.0140.05112.66
5.3.110.0130.05312.66
5.3.100.0240.09812.12
5.3.90.0210.06412.09
5.3.80.0060.05312.07
5.3.70.0090.05512.07
5.3.60.0100.05112.06
5.3.50.0120.05112.00
5.3.40.0110.05112.00
5.3.30.0090.05011.95
5.3.20.0110.04811.73
5.3.10.0090.05211.70
5.3.00.0170.08511.69
5.2.170.0140.0469.18
5.2.160.0060.0489.18
5.2.150.0100.0579.18
5.2.140.0120.0459.18
5.2.130.0100.0439.14
5.2.120.0070.0429.14
5.2.110.0090.0379.15
5.2.100.0070.0409.14
5.2.90.0070.0429.14
5.2.80.0060.0459.14
5.2.70.0080.0419.14
5.2.60.0110.0389.09
5.2.50.0100.0439.06
5.2.40.0070.0439.03
5.2.30.0040.0489.02
5.2.20.0080.0399.01
5.2.10.0080.0398.92
5.2.00.0090.0628.79
5.1.60.0070.0348.06
5.1.50.0110.0308.05
5.1.40.0080.0358.04
5.1.30.0080.0348.39
5.1.20.0100.0358.41
5.1.10.0110.0318.14
5.1.00.0070.0378.14
5.0.50.0070.0276.62
5.0.40.0060.0276.47
5.0.30.0060.0416.29
5.0.20.0050.0296.26
5.0.10.0040.0306.23
5.0.00.0070.0426.22
4.4.90.0060.0234.78
4.4.80.0050.0244.76
4.4.70.0040.0254.75
4.4.60.0040.0234.75
4.4.50.0050.0234.77
4.4.40.0050.0354.71
4.4.30.0240.0374.76
4.4.20.0070.0284.84
4.4.10.0130.0444.85
4.4.00.0130.0584.76
4.3.110.0190.0724.67
4.3.100.0090.0544.67
4.3.90.0180.0374.64
4.3.80.0170.0624.58
4.3.70.0130.0324.63
4.3.60.0080.0444.63
4.3.50.0140.0374.62
4.3.40.0060.0604.54
4.3.30.0090.0403.29
4.3.20.0000.0503.27
4.3.10.0110.0603.23
4.3.00.0030.01713.64

preferences:
40.84 ms | 401 KiB | 5 Q