3v4l.org

run code in 300+ PHP versions simultaneously
<?php function flatten_array(array $array, array $flat = array()) { foreach($array as $k=>$v){ if(!is_array($v)){ while(true){ $i = isset($i) ? $i+1 : 0; $key = $k.$i; if(!array_key_exists($key, $flat)) break; } $flat[$key] = $v; unset($array[$k]); }else{ $flat = flatten_array($v, $flat); } } return $flat; } $a = array_fill(0, 10, array_fill(0, 10, 0)); $array = flatten_array($a); var_dump($array);

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)
8.3.60.0160.00616.50
8.3.50.0120.01022.00
8.3.40.0080.00818.68
8.3.30.0110.00719.06
8.3.20.0080.00020.40
8.3.10.0040.00421.69
8.3.00.0040.00419.14
8.2.180.0070.01316.88
8.2.170.0180.00022.96
8.2.160.0000.01422.12
8.2.150.0060.00324.18
8.2.140.0100.00024.66
8.2.130.0050.00326.16
8.2.120.0070.00318.05
8.2.110.0100.00022.21
8.2.100.0120.00018.34
8.2.90.0000.00819.17
8.2.80.0050.00317.97
8.2.70.0000.01017.75
8.2.60.0030.00618.16
8.2.50.0050.00318.07
8.2.40.0040.00418.28
8.2.30.0060.00319.44
8.2.20.0030.00517.93
8.2.10.0030.00518.06
8.2.00.0040.00417.85
8.1.280.0120.00325.92
8.1.270.0040.00418.93
8.1.260.0080.00026.35
8.1.250.0100.00028.09
8.1.240.0030.00622.23
8.1.230.0040.00719.16
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0080.00317.36
8.1.190.0100.00017.35
8.1.180.0040.00418.10
8.1.170.0050.00318.44
8.1.160.0050.00222.07
8.1.150.0000.00718.89
8.1.140.0000.00817.46
8.1.130.0030.00317.87
8.1.120.0040.00417.37
8.1.110.0000.00917.46
8.1.100.0000.00817.34
8.1.90.0080.00017.43
8.1.80.0070.00017.34
8.1.70.0050.00217.48
8.1.60.0040.00417.61
8.1.50.0060.00317.50
8.1.40.0000.00917.59
8.1.30.0030.00517.72
8.1.20.0000.00817.70
8.1.10.0060.00317.54
8.1.00.0000.00817.52
8.0.300.0000.00818.77
8.0.290.0000.00916.75
8.0.280.0070.00018.44
8.0.270.0050.00217.30
8.0.260.0030.00317.19
8.0.250.0070.00016.93
8.0.240.0000.00816.99
8.0.230.0040.00416.93
8.0.220.0000.00716.95
8.0.210.0040.00416.89
8.0.200.0030.00317.03
8.0.190.0060.00316.96
8.0.180.0000.00717.00
8.0.170.0030.00517.02
8.0.160.0000.00817.01
8.0.150.0040.00416.85
8.0.140.0060.00616.94
8.0.130.0000.00613.37
8.0.120.0060.00316.96
8.0.110.0000.00817.02
8.0.100.0000.00716.79
8.0.90.0080.00016.96
8.0.80.0030.01516.93
8.0.70.0030.00516.85
8.0.60.0040.00416.84
8.0.50.0070.00017.00
8.0.30.0110.00917.05
8.0.20.0100.01117.40
8.0.10.0000.00817.07
8.0.00.0130.01316.96
7.4.330.0050.00015.03
7.4.320.0000.00716.51
7.4.300.0000.00616.51
7.4.290.0070.00316.58
7.4.280.0030.00616.50
7.4.270.0000.00716.51
7.4.260.0000.00916.49
7.4.250.0000.00816.46
7.4.240.0060.00116.54
7.4.230.0000.00816.41
7.4.220.0070.01516.52
7.4.210.0110.00516.53
7.4.200.0040.00416.64
7.4.160.0150.00716.69
7.4.150.0150.00717.40
7.4.140.0150.00617.86
7.4.130.0090.01116.51
7.4.120.0100.00916.51
7.4.110.0070.01716.52
7.4.100.0030.01716.48
7.4.90.0160.01016.51
7.4.80.0060.01219.39
7.4.70.0100.01016.48
7.4.60.0030.01516.43
7.4.50.0050.00016.54
7.4.40.0070.01016.59
7.4.30.0160.01016.61
7.4.00.0080.00914.88
7.3.330.0000.00613.31
7.3.320.0030.00313.41
7.3.310.0040.00416.45
7.3.300.0030.00316.45
7.3.290.0070.00016.44
7.3.280.0160.00216.40
7.3.270.0130.00417.40
7.3.260.0080.01316.37
7.3.250.0150.00716.51
7.3.240.0100.01016.63
7.3.230.0170.00616.44
7.3.210.0050.01616.58
7.3.200.0060.01219.39
7.3.190.0110.00516.53
7.3.180.0060.01216.48
7.3.170.0080.01116.45
7.3.160.0060.01216.35
7.3.120.0100.01014.77
7.3.110.0080.00615.00
7.3.100.0080.00814.82
7.3.90.0140.00414.84
7.3.80.0120.00414.84
7.3.70.0120.00314.82
7.3.60.0070.00314.66
7.3.50.0040.01114.62
7.3.40.0090.00614.90
7.3.30.0050.00514.74
7.3.20.0000.01216.61
7.3.10.0070.00916.60
7.3.00.0080.00716.67
7.2.330.0090.01116.54
7.2.320.0080.01216.57
7.2.310.0170.00316.56
7.2.300.0090.00916.78
7.2.290.0100.00916.73
7.2.250.0070.01415.20
7.2.240.0040.01515.04
7.2.230.0110.00715.04
7.2.220.0050.00515.14
7.2.210.0070.00715.12
7.2.200.0090.00615.10
7.2.190.0060.00615.04
7.2.180.0100.00715.04
7.2.170.0130.00614.86
7.2.130.0030.00616.93
7.2.120.0000.01516.92
7.2.110.0030.01216.75
7.2.100.0070.00716.99
7.2.90.0040.01116.72
7.2.80.0030.00917.02
7.2.70.0120.00317.02
7.2.60.0040.00716.74
7.2.50.0000.01616.71
7.2.40.0090.00617.03
7.2.30.0040.00816.98
7.2.20.0040.01417.02
7.2.10.0070.00716.84
7.2.00.0050.00718.28
7.1.330.0000.01515.85
7.1.320.0040.00815.59
7.1.310.0060.00315.70
7.1.300.0000.01315.87
7.1.290.0110.00316.00
7.1.280.0070.01015.91
7.1.270.0000.01315.61
7.1.260.0040.01215.50
7.1.250.0040.00715.83
7.1.200.0130.00015.48
7.1.100.0000.01218.29
7.1.70.0060.00317.17
7.1.60.0110.01519.46
7.1.50.0050.00516.80
7.1.00.0000.08022.48
7.0.200.0100.00015.12
7.0.140.0030.04722.07
7.0.60.0130.07720.02
7.0.50.0100.07317.93
7.0.40.0070.05020.18
7.0.30.0230.07020.21
7.0.20.0230.06720.05
7.0.10.0030.08720.26
7.0.00.0130.07720.33
5.6.280.0030.07721.13
5.6.210.0000.06720.77
5.6.200.0130.04718.23
5.6.190.0100.06720.77
5.6.180.0300.07320.42
5.6.170.0230.05720.48
5.6.160.0030.08320.46
5.6.150.0070.04318.11
5.6.140.0000.06318.18
5.6.130.0070.06318.15
5.6.120.0100.08021.03
5.6.110.0070.08021.02
5.6.100.0070.03721.05
5.6.90.0070.03720.95
5.6.80.0070.08020.51
5.5.350.0300.07720.47
5.5.340.0070.07717.99
5.5.330.0030.09020.43
5.5.320.0370.07020.37
5.5.310.0270.08020.35
5.5.300.0070.08018.01
5.5.290.0130.07718.04
5.5.280.0100.04020.80
5.5.270.0130.08020.83
5.5.260.0130.08020.79
5.5.250.0030.04720.70
5.5.240.0070.07020.34
5.4.450.0400.06019.64
5.4.440.0830.06019.47
5.4.430.0270.06719.48
5.4.420.0930.05019.61
5.4.410.0970.05319.32
5.4.400.0770.05719.26
5.4.390.1030.05018.58
5.4.380.1030.05018.78
5.4.370.0930.05018.64
5.4.360.0870.05718.81
5.4.350.1100.05018.54
5.4.340.1270.02718.83
5.4.320.0930.06018.61
5.4.310.0700.06318.74
5.4.300.0800.05318.78
5.4.290.1000.05018.54
5.4.280.0870.06018.57
5.4.270.1030.04718.78
5.4.260.0770.05318.57
5.4.250.0800.05318.78
5.4.240.0830.06018.54
5.4.230.1170.05018.82
5.4.220.0870.05718.63
5.4.210.1070.06718.60
5.4.200.1000.04316.67
5.4.190.0830.06718.71
5.4.180.0700.05718.59
5.4.170.0930.06018.45
5.4.160.0870.05718.73
5.4.150.0900.05318.52
5.4.140.1030.04316.27
5.4.130.0870.04716.34
5.4.120.0900.05016.28
5.4.110.1030.04016.35
5.4.100.0870.05316.35
5.4.90.0870.04316.25
5.4.80.1000.05316.18
5.4.70.0900.05016.26
5.4.60.0930.04316.28
5.4.50.1070.04316.32
5.4.40.0800.06316.25
5.4.30.0900.05016.25
5.4.20.0830.04716.31
5.4.10.0970.04316.30
5.4.00.1000.04015.73
5.3.290.1000.05714.71
5.3.280.0930.04714.63
5.3.270.1000.08314.79
5.3.260.0970.04714.82
5.3.250.0800.06014.63
5.3.240.0930.05014.83
5.3.230.0900.05714.66
5.3.220.0900.05314.75
5.3.210.0930.05714.63
5.3.200.0900.05314.75
5.3.190.0900.06314.58
5.3.180.0870.04314.71
5.3.170.0830.06714.75
5.3.160.0870.04714.60
5.3.150.0770.05014.56
5.3.140.0870.04014.74
5.3.130.0830.04714.61
5.3.120.0670.06314.77
5.3.110.0870.04714.61
5.3.100.1000.05314.24
5.3.90.0870.05314.20
5.3.80.0870.05314.04
5.3.70.0870.05714.24
5.3.60.0970.04714.06
5.3.50.0900.05014.14
5.3.40.0830.05714.02
5.3.30.0900.05313.97
5.3.20.0730.05313.73
5.3.10.0970.05013.70
5.3.00.0900.05013.66
5.2.170.0670.05311.20
5.2.160.0730.04311.28
5.2.150.0800.04011.29
5.2.140.0800.04011.18
5.2.130.0800.03711.17
5.2.120.0670.04711.14
5.2.110.0800.03711.18
5.2.100.0800.03711.14
5.2.90.0630.05311.35
5.2.80.0730.04711.32
5.2.70.0870.03711.11
5.2.60.0770.04311.28
5.2.50.0630.05011.06
5.2.40.0530.04011.03
5.2.30.0670.03711.21
5.2.20.0600.04011.10
5.2.10.0630.03710.90
5.2.00.0730.03010.94
5.1.60.0570.04010.04
5.1.50.0530.03310.04
5.1.40.0570.03710.12
5.1.30.0570.04310.35
5.1.20.0600.03710.45
5.1.10.0600.03310.12
5.1.00.0600.03710.20
5.0.50.0330.0238.63
5.0.40.0430.0178.40
5.0.30.0400.0338.34
5.0.20.0270.0308.33
5.0.10.0330.0278.16
5.0.00.0300.0438.21
4.4.90.0330.0205.89
4.4.80.0330.0205.90
4.4.70.0270.0235.91
4.4.60.0400.0105.88
4.4.50.0330.0205.91
4.4.40.0330.0305.92
4.4.30.0300.0205.96
4.4.20.0330.0205.94
4.4.10.0330.0206.05
4.4.00.0300.0375.90
4.3.110.0330.0205.93
4.3.100.0330.0205.81
4.3.90.0270.0235.80
4.3.80.0270.0335.77
4.3.70.0200.0235.80
4.3.60.0270.0235.79
4.3.50.0330.0205.79
4.3.40.0300.0335.76
4.3.30.0130.0234.56
4.3.20.0170.0204.52
4.3.10.0230.0174.52
4.3.00.0130.0239.46

preferences:
51.58 ms | 401 KiB | 5 Q