3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gen() { $data = array(); $i = 0; for($i; $i < 50; $i++) { $data[$i] = array( 'indent' => 'test ' . $i, 'depth' => 1 ); } return $data; } echo serialize(gen()); /* $array = array( 55 => array( 'ident' => 'test 1', 'depth' => 1, ), 77 => array( 'parent_id' => 55, 'ident' => 'test 2', 'depth' => 2, ), 109 => array( 'parent_id' => 77, 'ident' => 'test 3', 'depth' => 3, ), 78 => array( 'parent_id' => 55, 'ident' => 'test 4', 'depth' => 2, ), 25 => array( 'ident' => 'test 5', 'depth' => 1, ) ); */ $array = unserialize('a:0:{}'); /* function v1($array) { foreach ($array as $key => &$sub) { if (isset($sub['parent_id'])) { $array[$sub['parent_id']]['children'][$key] = &$sub; } } unset($sub); // unset the reference to make sure to not overwrite it later... // now remove the entries with parents foreach ($array as $key => $sub) { if (isset($sub['parent_id'])) unset($array[$key]); } return $array; } function push_at_key($what, $what_key, $key, $array) { foreach($array as $k => $v) { if($key == $k) { $array[$k]['children'][$what_key] = $what; return $array; } } foreach($array as $k => $v) { $array[$k] = push_at_key($what, $what_key, $key, $v['children']); } return $array; } function v2($array) { $out = array(); foreach ($array as $key => $sub) { if(!isset($sub['parent_id'])) { $out[$key] = $sub; } else { $out = push_at_key($sub, $key, $sub['parent_id'], $out); } } return $out; } //var_dump(v1($array)); //var_dump(v2($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)
8.3.60.0110.00718.55
8.3.50.0110.00718.30
8.3.40.0160.00618.84
8.3.30.0140.00018.53
8.3.20.0080.00018.90
8.3.10.0000.00821.04
8.3.00.0100.00018.68
8.2.180.0140.00718.41
8.2.170.0060.00922.96
8.2.160.0040.01120.39
8.2.150.0050.00324.18
8.2.140.0030.00524.66
8.2.130.0040.00426.16
8.2.120.0000.00721.18
8.2.110.0030.00620.47
8.2.100.0040.00817.91
8.2.90.0000.00719.35
8.2.80.0050.00317.97
8.2.70.0070.00417.49
8.2.60.0040.00418.04
8.2.50.0080.00018.07
8.2.40.0060.00318.09
8.2.30.0000.00719.32
8.2.20.0000.00817.71
8.2.10.0000.00817.62
8.2.00.0040.00717.78
8.1.270.0060.00323.99
8.1.260.0030.00526.35
8.1.250.0040.00428.09
8.1.240.0070.00322.64
8.1.230.0040.00720.99
8.1.220.0040.00418.77
8.1.210.0080.00018.97
8.1.200.0040.00417.35
8.1.190.0000.00717.41
8.1.180.0040.00418.10
8.1.170.0030.00518.46
8.1.160.0040.00418.80
8.1.150.0000.00718.52
8.1.140.0000.00817.43
8.1.130.0040.00417.83
8.1.120.0040.00417.38
8.1.110.0000.00817.35
8.1.100.0040.00417.43
8.1.90.0000.00817.39
8.1.80.0040.00417.40
8.1.70.0000.00717.36
8.1.60.0040.00417.61
8.1.50.0000.00817.49
8.1.40.0000.00717.51
8.1.30.0080.00017.69
8.1.20.0030.00517.63
8.1.10.0030.00717.53
8.1.00.0020.00517.52
8.0.300.0000.00819.84
8.0.290.0050.00317.05
8.0.280.0030.00318.48
8.0.270.0040.00417.24
8.0.260.0030.00316.81
8.0.250.0000.00816.96
8.0.240.0040.00416.92
8.0.230.0070.00016.96
8.0.220.0030.00316.91
8.0.210.0030.00416.92
8.0.200.0000.00617.06
8.0.190.0000.00817.03
8.0.180.0080.00016.97
8.0.170.0040.00416.99
8.0.160.0030.00316.98
8.0.150.0000.00716.85
8.0.140.0040.00416.91
8.0.130.0030.00513.34
8.0.120.0000.00916.89
8.0.110.0040.00416.83
8.0.100.0040.00416.94
8.0.90.0080.00016.77
8.0.80.0030.01216.87
8.0.70.0040.00416.76
8.0.60.0040.00416.77
8.0.50.0040.00416.88
8.0.30.0110.01117.16
8.0.20.0120.01317.40
8.0.10.0040.00417.13
8.0.00.0120.00916.68
7.4.330.0050.00016.79
7.4.320.0030.00316.33
7.4.300.0070.00016.40
7.4.290.0000.00716.60
7.4.280.0040.00316.50
7.4.270.0000.00616.43
7.4.260.0000.00513.27
7.4.250.0040.00416.55
7.4.240.0000.00716.64
7.4.230.0040.00416.58
7.4.220.0100.01016.40
7.4.210.0080.00816.51
7.4.200.0070.00016.49
7.4.190.0000.00816.55
7.4.160.0160.00316.44
7.4.150.0130.00317.40
7.4.140.0080.00917.86
7.4.130.0140.00316.61
7.4.120.0070.00916.47
7.4.110.0060.01016.29
7.4.100.0090.01216.52
7.4.90.0080.01116.39
7.4.80.0120.00619.39
7.4.70.0030.01416.44
7.4.60.0080.00816.61
7.4.50.0050.00316.38
7.4.40.0060.00622.77
7.4.30.0150.00416.48
7.4.00.0060.00915.21
7.3.330.0000.00713.23
7.3.320.0000.00613.18
7.3.310.0030.00316.46
7.3.300.0040.00416.45
7.3.290.0050.00816.38
7.3.280.0090.00816.39
7.3.270.0110.01017.40
7.3.260.0050.01418.24
7.3.250.0100.00616.46
7.3.240.0160.00016.71
7.3.230.0030.01316.60
7.3.210.0140.00616.66
7.3.200.0110.00619.39
7.3.190.0030.01516.60
7.3.180.0070.00716.29
7.3.170.0060.00916.48
7.3.160.0080.00816.45
7.3.120.0030.01414.92
7.2.330.0130.00416.44
7.2.320.0100.01416.57
7.2.310.0090.00916.77
7.2.300.0060.00916.76
7.2.290.0060.01016.45
7.2.60.0040.01116.88
7.2.00.0000.01219.14
7.1.200.0070.00315.63
7.1.100.0070.00717.65
7.1.70.0000.00817.22
7.1.60.0090.00617.23
7.1.50.0000.01216.99
7.1.00.0000.07722.40
7.0.200.0000.01316.82
7.0.140.0030.07322.00
7.0.100.0030.05019.96
7.0.90.0000.04020.02
7.0.80.0000.08720.05
7.0.70.0030.03720.14
7.0.60.0030.09019.94
7.0.50.0030.06020.31
7.0.40.0030.04020.17
7.0.30.0070.08320.13
7.0.20.0070.08720.18
7.0.10.0070.08020.06
7.0.00.0070.09020.01
5.6.280.0030.07321.12
5.6.250.0070.08020.69
5.6.240.0030.07020.76
5.6.230.0000.04320.78
5.6.220.0030.08320.61
5.6.210.0100.06320.61
5.6.200.0030.06021.09
5.6.190.0100.03320.95
5.6.180.0200.07020.96
5.6.170.0100.08021.05
5.6.160.0100.07321.08
5.6.150.0130.05021.12
5.6.140.0030.08721.11
5.6.130.0100.07721.00
5.6.120.0070.08321.08
5.6.110.0100.08020.96
5.6.100.0030.03721.13
5.6.90.0000.08321.03
5.6.80.0200.07320.34
5.6.70.0070.08020.55
5.6.60.0130.04720.42
5.6.50.0070.04020.50
5.6.40.0030.04320.44
5.6.30.0030.05020.50
5.6.20.0070.03720.42
5.6.10.0130.03020.39
5.6.00.0070.03720.40
5.5.380.0230.06320.45
5.5.370.0070.07720.39
5.5.360.0030.05320.39
5.5.350.0100.07320.51
5.5.340.0100.03020.79
5.5.330.0170.04720.89
5.5.320.0100.08320.77
5.5.310.0000.04020.67
5.5.300.0030.03720.83
5.5.290.0030.06320.86
5.5.280.0170.07020.84
5.5.270.0000.09320.88
5.5.260.0070.08720.82
5.5.250.0130.08020.73
5.5.240.0130.06020.20
5.5.230.0030.03720.21
5.5.220.0130.03020.32
5.5.210.0030.03720.16
5.5.200.0030.03720.16
5.5.190.0030.04020.11
5.5.180.0030.04720.03
5.5.160.0030.04020.18
5.5.150.0070.03320.27
5.5.140.0030.03320.27
5.5.130.0000.04320.25
5.5.120.0030.03320.25
5.5.110.0070.03720.29
5.5.100.0100.03720.13
5.5.90.0100.03020.14
5.5.80.0100.02720.16
5.5.70.0030.04020.13
5.5.60.0030.04020.09
5.5.50.0030.04320.16
5.5.40.0000.04320.06
5.5.30.0000.03720.18
5.5.20.0030.04019.99
5.5.10.0070.03020.05
5.5.00.0070.03020.07
5.4.450.0000.04019.48
5.4.440.0070.07019.35
5.4.430.0100.07019.20
5.4.420.0100.07019.48
5.4.410.0000.04319.32
5.4.400.0000.08719.05
5.4.390.0100.07719.23
5.4.380.0030.03319.18
5.4.370.0000.05019.18
5.4.360.0030.04019.09
5.4.350.0030.03319.07
5.4.340.0100.03319.18
5.4.320.0100.03719.16
5.4.310.0070.03718.86
5.4.300.0030.04019.20
5.4.290.0030.03018.87
5.4.280.0070.03719.20
5.4.270.0030.03719.02
5.4.260.0000.03718.87
5.4.250.0100.02719.25
5.4.240.0070.03019.14
5.4.230.0030.04019.02
5.4.220.0000.03319.04
5.4.210.0070.05319.16
5.4.200.0070.03319.12
5.4.190.0130.03019.17
5.4.180.0030.03018.86
5.4.170.0070.03319.03
5.4.160.0000.03319.03
5.4.150.0000.04018.96
5.4.140.0000.03316.36
5.4.130.0030.02716.45
5.4.120.0000.04316.41
5.4.110.0000.03316.42
5.4.100.0000.03716.49
5.4.90.0070.02716.46
5.4.80.0030.03016.36
5.4.70.0070.02716.54
5.4.60.0000.03316.30
5.4.50.0030.03016.41
5.4.40.0000.04016.42
5.4.30.0070.02716.51
5.4.20.0030.03016.53
5.4.10.0100.02316.50
5.4.00.0070.03315.90
5.3.290.0130.02714.74
5.3.280.0000.04014.67
5.3.270.0030.03014.64
5.3.260.0070.03314.77
5.3.250.0030.03314.67
5.3.240.0070.03314.68
5.3.230.0000.03314.62
5.3.220.0000.03314.67
5.3.210.0030.04714.68
5.3.200.0030.03014.70
5.3.190.0070.02714.60
5.3.180.0030.03014.70
5.3.170.0030.03014.71
5.3.160.0070.02714.70
5.3.150.0030.03314.75
5.3.140.0070.03314.72
5.3.130.0070.02714.54
5.3.120.0070.02714.62
5.3.110.0070.03014.53
5.3.100.0000.03714.20
5.3.90.0030.03314.04
5.3.80.0030.03014.12
5.3.70.0070.02713.96
5.3.60.0070.03014.02
5.3.50.0000.03314.01
5.3.40.0070.05013.92
5.3.30.0070.07014.04
5.3.20.0100.02313.74
5.3.10.0100.05713.68
5.3.00.0000.05713.74
5.2.170.0030.02711.77
5.2.160.0030.04311.77
5.2.150.0070.04011.77
5.2.140.0100.05311.77
5.2.130.0130.05311.77
5.2.120.0100.04711.77
5.2.110.0030.05711.77
5.2.100.0030.03011.77
5.2.90.0070.04711.77
5.2.80.0000.03311.77
5.2.70.0030.02711.77
5.2.60.0000.03311.77
5.2.50.0070.03011.77
5.2.40.0070.06011.77
5.2.30.0030.06711.77
5.2.20.0100.01711.77
5.2.10.0030.02311.77
5.2.00.0030.04011.77
5.1.60.0030.02011.77
5.1.50.0000.02311.77
5.1.40.0070.01711.77
5.1.30.0000.05011.77
5.1.20.0030.05311.77
5.1.10.0030.03311.77
5.1.00.0030.05711.77
5.0.50.0000.02011.77
5.0.40.0070.03011.77
5.0.30.0000.05711.77
5.0.20.0030.03311.77
5.0.10.0100.04011.77
5.0.00.0100.05711.77
4.4.90.0030.03311.77
4.4.80.0030.01311.77
4.4.70.0000.04011.77
4.4.60.0000.03711.77
4.4.50.0000.01711.77
4.4.40.0030.05311.77
4.4.30.0070.02011.77
4.4.20.0030.03311.77
4.4.10.0000.03711.77
4.4.00.0030.03311.77
4.3.110.0000.02011.77
4.3.100.0030.03311.77
4.3.90.0030.01011.77
4.3.80.0030.02311.77
4.3.70.0000.03311.77
4.3.60.0000.02711.77
4.3.50.0000.01311.77
4.3.40.0000.02311.77
4.3.30.0030.03011.77
4.3.20.0070.03011.77
4.3.10.0030.03311.77
4.3.00.0000.02311.77

preferences:
59.26 ms | 400 KiB | 5 Q