3v4l.org

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

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)
8.3.60.0090.00618.18
8.3.50.0080.01121.98
8.3.40.0110.00418.67
8.3.30.0000.01419.05
8.3.20.0060.00320.38
8.3.10.0080.00023.78
8.3.00.0080.00022.31
8.2.180.0150.00018.41
8.2.170.0060.00922.96
8.2.160.0110.00722.14
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0000.00726.16
8.2.120.0030.00522.15
8.2.110.0040.00422.14
8.2.100.0090.00317.47
8.2.90.0080.00019.09
8.2.80.0090.00018.04
8.2.70.0060.00317.38
8.2.60.0080.00017.91
8.2.50.0060.00418.07
8.2.40.0050.00317.97
8.2.30.0050.00217.81
8.2.20.0000.00817.41
8.2.10.0030.00619.21
8.2.00.0030.00717.60
8.1.280.0100.01025.92
8.1.270.0040.00422.20
8.1.260.0080.00026.35
8.1.250.0000.00828.09
8.1.240.0000.00923.96
8.1.230.0080.00419.07
8.1.220.0000.00917.74
8.1.210.0040.00418.77
8.1.200.0030.00617.23
8.1.190.0050.00317.27
8.1.180.0040.00418.10
8.1.170.0000.00818.65
8.1.160.0000.00721.89
8.1.150.0040.00418.51
8.1.140.0050.00317.28
8.1.130.0000.00717.68
8.1.120.0040.00417.35
8.1.110.0070.00017.33
8.1.100.0000.00717.37
8.1.90.0070.00417.37
8.1.80.0040.00417.19
8.1.70.0030.00317.26
8.1.60.0040.00417.34
8.1.50.0070.00017.30
8.1.40.0000.00717.36
8.1.30.0060.00317.48
8.1.20.0040.00417.53
8.1.10.0030.00617.31
8.1.00.0040.00417.29
8.0.300.0030.00518.77
8.0.290.0070.00016.93
8.0.280.0030.00318.22
8.0.270.0000.00717.05
8.0.260.0000.00716.64
8.0.250.0040.00416.84
8.0.240.0030.00316.73
8.0.230.0040.00416.83
8.0.220.0040.00416.71
8.0.210.0040.00416.75
8.0.200.0000.00716.82
8.0.190.0080.00016.83
8.0.180.0040.00416.77
8.0.170.0070.00016.81
8.0.160.0050.00216.63
8.0.150.0030.00316.67
8.0.140.0040.00416.61
8.0.130.0030.00313.12
8.0.120.0000.00716.77
8.0.110.0000.00716.80
8.0.100.0080.00016.75
8.0.90.0000.00716.76
8.0.80.0100.00516.70
8.0.70.0000.00816.64
8.0.60.0070.00016.58
8.0.50.0050.00316.58
8.0.30.0130.00816.80
8.0.20.0140.00917.40
8.0.10.0040.00416.87
8.0.00.0090.01016.53
7.4.330.0050.00015.00
7.4.320.0000.00616.45
7.4.300.0000.00616.27
7.4.290.0030.00716.36
7.4.280.0070.00016.38
7.4.270.0040.00716.23
7.4.260.0000.00816.32
7.4.250.0000.00716.38
7.4.240.0050.00316.43
7.4.230.0030.00316.56
7.4.220.0060.01016.42
7.4.210.0100.00716.45
7.4.200.0000.00716.26
7.4.190.0070.00016.63
7.4.160.0140.00616.36
7.4.150.0120.00617.40
7.4.140.0080.01217.86
7.4.130.0170.00216.37
7.4.120.0150.00616.29
7.4.110.0130.01416.41
7.4.100.0130.00716.49
7.4.90.0060.01616.46
7.4.80.0070.01019.37
7.4.70.0100.00616.61
7.4.60.0050.01016.30
7.4.50.0000.00816.38
7.4.40.0100.00622.77
7.4.30.0080.00816.41
7.4.00.0030.01014.62
7.3.330.0020.00213.18
7.3.320.0030.00313.19
7.3.310.0000.00616.28
7.3.300.0030.00316.23
7.3.290.0070.00716.17
7.3.280.0080.00916.19
7.3.270.0110.01417.40
7.3.260.0090.00916.38
7.3.250.0060.01116.26
7.3.240.0140.00716.03
7.3.230.0060.01016.51
7.3.210.0070.01116.21
7.3.200.0160.00019.39
7.3.190.0100.00716.12
7.3.180.0060.01016.17
7.3.170.0030.01316.27
7.3.160.0060.01016.17
7.3.120.0080.00514.89
7.2.330.0130.00416.30
7.2.320.0160.00016.19
7.2.310.0060.01016.58
7.2.300.0100.00716.41
7.2.290.0060.00916.56
7.2.110.0210.00416.35
7.2.100.0170.00916.41
7.2.90.0240.01216.46
7.2.80.0260.00016.25
7.2.70.0280.00816.64
7.2.60.0190.00616.75
7.2.50.0270.00816.69
7.2.40.0210.01616.70
7.2.30.0230.01016.46
7.2.20.0270.00416.57
7.2.10.0240.01216.59
7.2.00.0080.01118.13
7.1.230.0160.00815.69
7.1.220.0100.01615.73
7.1.210.0120.01215.37
7.1.200.0230.00815.53
7.1.190.0190.01115.77
7.1.180.0180.01415.59
7.1.170.0250.00315.73
7.1.160.0210.00815.73
7.1.150.0260.00315.40
7.1.140.0270.00615.68
7.1.130.0150.00815.74
7.1.120.0260.00415.24
7.1.110.0190.01115.81
7.1.100.0140.00916.72
7.1.90.0160.01215.68
7.1.80.0220.00915.75
7.1.70.0140.01016.20
7.1.60.0160.01417.54
7.1.50.0240.01225.26
7.1.40.0180.01215.15
7.1.30.0340.00315.93
7.1.20.0260.00915.60
7.1.10.0080.00615.36
7.1.00.0100.04018.88
7.0.310.0230.00815.30
7.0.300.0190.00815.23
7.0.290.0190.01015.22
7.0.280.0170.01415.43
7.0.270.0210.00715.27
7.0.260.0200.00815.20
7.0.250.0260.00315.27
7.0.240.0200.00915.31
7.0.230.0150.00715.10
7.0.220.0250.00415.29
7.0.210.0260.00614.95
7.0.200.0100.01215.93
7.0.190.0270.00415.30
7.0.180.0190.00815.44
7.0.170.0270.00014.94
7.0.160.0260.00015.21
7.0.150.0060.00615.15
7.0.140.0090.04018.59
7.0.130.0130.00315.04
7.0.120.0120.00615.31
7.0.110.0110.00714.95
7.0.100.0150.00315.07
7.0.90.0100.00614.76
7.0.80.0160.00015.21
7.0.70.0120.00614.95
7.0.60.0050.02617.54
7.0.50.0100.04016.56
7.0.40.0110.02316.69
7.0.30.0170.03316.67
7.0.20.0180.04516.71
7.0.10.0080.04216.69
7.0.00.0050.05116.55
5.6.380.0150.00614.15
5.6.370.0160.00614.14
5.6.360.0090.01114.45
5.6.350.0140.00914.15
5.6.340.0090.01014.40
5.6.330.0190.00614.09
5.6.320.0160.00814.05
5.6.310.0190.01114.25
5.6.300.0100.00314.07
5.6.290.0070.00713.89
5.6.280.0100.03517.39
5.6.270.0090.00613.55
5.6.260.0040.00814.04
5.6.250.0030.01213.98
5.6.240.0130.00313.98
5.6.230.0060.00914.03
5.6.220.0030.01014.14
5.6.210.0140.04017.21
5.6.200.0120.03215.92
5.6.190.0080.04617.33
5.6.180.0140.03517.30
5.6.170.0130.02317.32
5.6.160.0050.04717.26
5.6.150.0050.02516.07
5.6.140.0080.02616.05
5.6.130.0030.04116.05
5.6.120.0060.04817.58
5.6.110.0040.02417.70
5.6.100.0100.03517.46
5.6.90.0080.03817.53
5.6.80.0090.03617.25
5.6.70.2550.02017.28
5.6.60.0080.00513.73
5.6.50.0060.00914.07
5.6.40.0070.01013.91
5.6.30.0060.00913.87
5.6.20.0100.00713.85
5.6.10.0090.00313.97
5.6.00.0080.00513.86
5.5.380.0060.00610.93
5.5.370.0110.00010.52
5.5.360.0060.00311.00
5.5.350.0100.04215.62
5.5.340.0090.02014.26
5.5.330.0060.02315.45
5.5.320.0030.04615.72
5.5.310.0140.02015.66
5.5.300.0060.03514.43
5.5.290.0070.04514.46
5.5.280.0070.03015.89
5.5.270.0040.02315.60
5.5.260.0060.03115.71
5.5.250.0050.02215.69
5.5.240.0180.03515.68
5.5.230.0030.00710.88
5.5.220.0060.00310.71
5.5.210.0040.00810.71
5.5.200.0030.00910.40
5.5.190.0080.00310.60
5.5.180.0060.00611.01
5.5.170.0080.00313.80
5.5.160.0060.00611.02
5.5.150.0090.00310.84
5.5.140.0060.00610.64
5.5.130.0040.00710.79
5.5.120.0070.00310.69
5.5.110.0090.00310.90
5.5.100.0090.00310.42
5.5.90.0110.00010.64
5.5.80.0000.01210.65
5.5.70.0090.00310.45
5.5.60.0030.00610.27
5.5.50.0110.00010.47
5.5.40.0080.00310.80
5.5.30.0030.00910.71
5.5.20.0060.00610.47
5.5.10.0030.00810.63
5.5.00.0060.00310.59
5.4.450.0450.03015.24
5.4.440.0460.02515.19
5.4.430.0100.02814.96
5.4.420.0430.00315.12
5.4.410.0110.02614.77
5.4.400.0380.04114.58
5.4.390.0480.02614.82
5.4.380.0150.03014.68
5.4.370.0230.01814.69
5.4.360.0100.02214.57
5.4.350.0060.02211.34
5.4.340.0040.02311.29
5.4.330.0030.00810.67
5.4.320.0080.01911.65
5.4.310.0040.02511.54
5.4.300.0060.02111.52
5.4.290.0070.02111.63
5.4.280.0090.04211.56
5.4.270.0100.03811.43
5.4.260.0080.02911.38
5.4.250.0110.02711.46
5.4.240.0080.03511.37
5.4.230.0080.04111.36
5.4.220.0100.02711.38
5.4.210.0090.02011.52
5.4.200.0090.03011.43
5.4.190.0120.04311.42
5.4.180.0140.05111.54
5.4.170.0080.02411.50
5.4.160.0090.04011.45
5.4.150.0080.02611.50
5.4.140.0070.02111.26
5.4.130.0110.04111.35
5.4.120.0080.03211.25
5.4.110.0100.03411.46
5.4.100.0130.01611.27
5.4.90.0060.02811.41
5.4.80.0050.02711.28
5.4.70.0090.02111.25
5.4.60.0100.02911.12
5.4.50.0140.02611.26
5.4.40.0130.01911.34
5.4.30.0090.03211.30
5.4.20.0170.03511.17
5.4.10.0110.03311.25
5.4.00.0070.02911.03
5.3.290.0040.02211.60
5.3.280.0090.03211.38
5.3.270.0080.03511.45
5.3.260.0100.03411.57
5.3.250.0070.03511.53
5.3.240.0100.03211.47
5.3.230.0120.02911.47
5.3.220.0090.03211.44
5.3.210.0110.03311.46
5.3.200.0090.03111.46
5.3.190.0110.03011.47
5.3.180.0070.03111.48
5.3.170.0090.02911.55
5.3.160.0100.02711.57
5.3.150.0110.03011.57
5.3.140.0110.02811.49
5.3.130.0100.03211.36
5.3.120.0080.03311.51
5.3.110.0090.02911.51
5.3.100.0080.02911.26
5.3.90.0050.03211.28
5.3.80.0070.03011.12
5.3.70.0050.03111.24
5.3.60.0090.02711.09
5.3.50.0080.02911.13
5.3.40.0080.03111.14
5.3.30.0070.03011.11
5.3.20.0120.02510.88
5.3.10.0110.02710.84
5.3.00.0110.02610.88
5.2.170.0050.0279.27
5.2.160.0040.0249.30
5.2.150.0050.0269.13
5.2.140.0080.0279.09
5.2.130.0050.0289.24
5.2.120.0060.0259.24
5.2.110.0080.0259.28
5.2.100.0090.0239.23
5.2.90.0090.0219.22
5.2.80.0040.0279.18
5.2.70.0050.0279.17
5.2.60.0080.0219.15
5.2.50.0040.0269.17
5.2.40.0060.0269.10
5.2.30.0070.0259.11
5.2.20.0070.0239.03
5.2.10.0080.0198.99
5.2.00.0080.0248.87
5.1.60.0060.0218.40
5.1.50.0070.0198.39
5.1.40.0070.0178.39
5.1.30.0050.0228.56
5.1.20.0070.0298.57
5.1.10.0040.0168.43
5.1.00.0040.0158.44
5.0.50.0070.0117.67
5.0.40.0040.0147.60
5.0.30.0030.0217.51
5.0.20.0040.0147.49
5.0.10.0060.0137.48
5.0.00.0080.0177.48
4.4.90.0030.0156.75
4.4.80.0030.0156.74
4.4.70.0030.0156.74
4.4.60.0040.0116.74
4.4.50.0050.0096.75
4.4.40.0010.0176.72
4.4.30.0020.0116.75
4.4.20.0020.0126.79
4.4.10.0030.0126.79
4.4.00.0040.0176.74
4.3.110.0030.0126.70
4.3.100.0060.0106.70
4.3.90.0040.0146.68
4.3.80.0040.0196.66
4.3.70.0040.0136.68
4.3.60.0040.0126.68
4.3.50.0020.0176.68
4.3.40.0040.0206.63
4.3.30.0020.0156.01
4.3.20.0040.0136.00
4.3.10.0030.0135.98
4.3.00.0270.0176.58

preferences:
67.92 ms | 401 KiB | 5 Q