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run code in 300+ PHP versions simultaneously
<?php class SudokuSolver { protected $sudokuColumns; public function __construct ($sudoku) { $this->sudokuColumns = $sudoku; } protected static function getNumbers () { return array_flip(str_split("123456789")); } // could be static as well public function printOut ($sudoku) { foreach ($sudoku as $column) { foreach ($column as $cell) { echo "|"; if (null !== $cell) { echo $cell; } else { echo " "; } } echo "|\n"; } } public function solve() { $this->checkConsistenz(); } protected function checkConsistenz () { $columns = $this->sudokuColumns; // check rows -> own method $rows = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { $rows[$rowIndex][$columnIndex] = $cell; } //$this->printOut($rows); } foreach ($rows as $rowIndex => $row) { var_export($this->checkRow($rowIndex,$row)); } } protected function checkRow ($rowIndex, $row) { $numbers = self::getNumbers(); echo "checking $rowIndex..\n"; foreach ($row as $column) { if (null === $column) { continue; } //echo "$column , $numbers\n" . var_export(strpos($numbers,$column),true); if (!array_key_exists($column,$numbers)) { return false; } unset($numbers[$column]); } return true; } } $sudoku = array(); $sudoku[] = array(null,3,null, null,null,null, null,null,null); $sudoku[] = array(null,3,null, 1,9,5, null,null,null); $sudoku[] = array(null,null,8, null,null,null, null,6,null); $sudoku[] = array(8,null,null, null,6,null, null,null,null); $sudoku[] = array(4,null,null, 8,null,null, null,null,1); $sudoku[] = array(null,null,null ,null,2,null, null,null,null); $sudoku[] = array(null,6,null, null,null,null, 2,8,null); $sudoku[] = array(null,null,null, 4,1,9, null,null,5); $sudoku[] = array(null,null,null, null,null,null, null,7,null); $sudokuSolver = new SudokuSolver($sudoku); //$sudokuSolver->printOut($sudoku); $sudokuSolver->solve($sudoku);

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)
8.3.60.0090.00618.30
8.3.50.0120.00821.27
8.3.40.0130.00718.78
8.3.30.0090.00918.71
8.3.20.0050.00318.73
8.3.10.0040.00421.19
8.3.00.0080.00023.78
8.2.180.0180.00016.32
8.2.170.0070.00722.96
8.2.160.0130.00720.27
8.2.150.0050.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0070.00021.04
8.2.110.0030.00720.29
8.2.100.0060.00617.91
8.2.90.0080.00019.35
8.2.80.0040.00417.97
8.2.70.0030.00817.75
8.2.60.0000.00917.93
8.2.50.0050.00318.07
8.2.40.0000.00818.22
8.2.30.0070.00021.21
8.2.20.0050.00317.62
8.2.10.0040.00417.63
8.2.00.0060.00317.83
8.1.280.0090.00625.92
8.1.270.0000.00723.99
8.1.260.0050.00326.35
8.1.250.0080.00028.09
8.1.240.0000.00922.50
8.1.230.0000.01120.97
8.1.220.0040.00418.77
8.1.210.0090.00318.82
8.1.200.0040.00417.35
8.1.190.0000.00817.63
8.1.180.0030.00618.10
8.1.170.0050.00318.49
8.1.160.0000.00718.91
8.1.150.0060.00318.58
8.1.140.0040.00417.53
8.1.130.0030.00317.89
8.1.120.0000.00717.50
8.1.110.0050.00317.39
8.1.100.0050.00217.54
8.1.90.0050.00317.52
8.1.80.0040.00417.39
8.1.70.0000.00717.51
8.1.60.0060.00317.58
8.1.50.0030.00517.52
8.1.40.0050.00317.52
8.1.30.0040.00417.67
8.1.20.0050.00317.72
8.1.10.0030.00517.59
8.1.00.0100.00017.54
8.0.300.0080.00319.97
8.0.290.0000.00717.18
8.0.280.0030.00318.47
8.0.270.0080.00017.16
8.0.260.0070.00016.85
8.0.250.0000.00716.84
8.0.240.0000.01116.98
8.0.230.0030.00316.89
8.0.220.0000.00816.80
8.0.210.0070.00016.88
8.0.200.0070.00016.97
8.0.190.0000.00717.04
8.0.180.0000.00816.95
8.0.170.0040.00416.91
8.0.160.0080.00016.91
8.0.150.0050.00316.78
8.0.140.0040.00416.94
8.0.130.0000.00513.28
8.0.120.0000.00816.77
8.0.110.0020.00516.96
8.0.100.0030.00516.90
8.0.90.0040.00416.96
8.0.80.0030.01216.83
8.0.70.0070.00016.92
8.0.60.0050.00316.91
8.0.50.0000.00816.85
8.0.30.0090.00917.10
8.0.20.0090.00917.40
8.0.10.0000.00716.95
8.0.00.0140.01016.84
7.4.330.0000.00614.65
7.4.320.0060.00016.47
7.4.300.0000.00716.55
7.4.290.0070.00016.63
7.4.280.0030.00316.59
7.4.270.0030.00316.60
7.4.260.0000.00513.20
7.4.250.0040.00416.41
7.4.240.0000.00816.63
7.4.230.0030.00316.38
7.4.220.0090.01416.34
7.4.210.0050.01216.63
7.4.200.0050.00316.39
7.4.190.0000.00716.69
7.4.160.0090.00916.43
7.4.150.0190.00617.40
7.4.140.0080.01017.86
7.4.130.0030.01616.53
7.4.120.0110.00616.53
7.4.110.0100.01316.60
7.4.100.0130.01016.67
7.4.90.0100.01316.62
7.4.80.0060.01119.39
7.4.70.0030.01616.54
7.4.60.0050.01116.50
7.4.50.0000.00916.49
7.4.40.0090.00622.77
7.4.30.0060.01116.41
7.4.00.0070.01014.63
7.3.330.0000.00613.25
7.3.320.0000.00613.29
7.3.310.0040.00416.43
7.3.300.0030.00316.43
7.3.290.0070.00716.39
7.3.280.0030.01216.34
7.3.270.0140.00517.40
7.3.260.0140.00618.24
7.3.250.0070.01116.51
7.3.240.0110.00616.45
7.3.230.0060.01016.54
7.3.210.0060.01216.36
7.3.200.0030.01719.39
7.3.190.0100.01316.44
7.3.180.0060.01016.71
7.3.170.0060.01216.31
7.3.160.0070.01016.63
7.3.120.0030.01315.07
7.2.330.0150.00316.87
7.2.320.0070.01116.90
7.2.310.0100.01316.80
7.2.300.0160.00016.75
7.2.290.0160.00016.77
7.2.00.0110.00019.48
7.1.100.0040.00818.08
7.1.70.0070.00316.89
7.1.60.0090.01519.40
7.1.50.0090.01516.64
7.1.00.0030.03322.30
7.0.200.0000.00816.96
7.0.140.0000.07722.06
7.0.70.0700.08020.00
7.0.60.0970.07319.94
7.0.50.0800.09020.37
7.0.40.0370.06020.19
7.0.30.0100.08020.07
7.0.20.0130.04720.13
7.0.10.0130.06320.10
7.0.00.0030.04320.07
5.6.280.0070.07021.16
5.6.220.0070.04720.68
5.6.210.0100.05320.62
5.6.200.0070.05721.08
5.6.190.0070.07321.14
5.6.180.0070.08720.96
5.6.170.0100.08321.07
5.6.160.0030.08321.20
5.6.150.0030.09021.09
5.6.140.0070.08721.05
5.6.130.0100.04321.03
5.6.120.0130.06721.13
5.6.110.0000.09020.98
5.6.100.0070.04720.96
5.6.90.0130.07720.98
5.6.80.0070.03720.46
5.6.70.0100.07720.58
5.6.60.0130.07720.58
5.6.50.0070.05320.45
5.6.40.0130.08320.34
5.6.30.0000.09020.47
5.6.20.0070.09320.33
5.6.10.0070.07320.34
5.6.00.0070.07320.42
5.5.360.0070.07020.57
5.5.350.0100.08020.40
5.5.340.0070.08320.96
5.5.330.0130.07020.77
5.5.320.0100.08320.95
5.5.310.0200.07020.86
5.5.300.0030.07020.79
5.5.290.0130.06720.82
5.5.280.0030.04720.86
5.5.270.0070.08720.79
5.5.260.0170.07020.78
5.5.250.0100.07720.72
5.5.240.0070.07720.18
5.5.230.0030.07320.34
5.5.220.0030.05720.05
5.5.210.0100.05720.30
5.5.200.0130.08020.29
5.5.190.0170.07720.31
5.5.180.0000.06320.31
5.5.160.0070.08320.19
5.5.150.0130.07020.16
5.5.140.0030.04320.02
5.5.130.0030.04720.29
5.5.120.0030.07720.28
5.5.110.0000.06320.02
5.5.100.0100.08019.99
5.5.90.0100.06319.98
5.5.80.0030.08020.13
5.5.70.0100.05720.12
5.5.60.0100.07320.19
5.5.50.0070.07320.07
5.5.40.0100.06020.00
5.5.30.0070.04020.15
5.5.20.0070.05019.99
5.5.10.0030.05019.98
5.5.00.0070.03720.14
5.4.450.0130.07719.38
5.4.440.0070.07719.51
5.4.430.0100.04319.35
5.4.420.0100.08319.46
5.4.410.0030.07719.37
5.4.400.0070.04319.17
5.4.390.0030.07719.21
5.4.380.0070.08318.95
5.4.370.0170.06719.16
5.4.360.0100.07019.18
5.4.350.0070.07319.09
5.4.340.0070.06019.02
5.4.320.0030.08318.95
5.4.310.0030.05318.90
5.4.300.0000.07718.87
5.4.290.0070.06019.12
5.4.280.0030.05719.03
5.4.270.0100.07319.04
5.4.260.0000.04019.20
5.4.250.0070.08319.13
5.4.240.0130.07019.13
5.4.230.0170.07018.87
5.4.220.0070.05719.12
5.4.210.0070.04019.04
5.4.200.0100.07019.20
5.4.190.0030.06019.20
5.4.180.0070.07319.11
5.4.170.0070.07719.02
5.4.160.0000.06019.21
5.4.150.0170.07719.18
5.4.140.0200.06316.52
5.4.130.0070.07316.50
5.4.120.0070.07316.30
5.4.110.0130.06716.48
5.4.100.0030.05016.39
5.4.90.0000.05716.45
5.4.80.0070.08016.55
5.4.70.0100.07316.38
5.4.60.0100.06316.37
5.4.50.0070.07716.46
5.4.40.0070.04016.58
5.4.30.0130.06716.45
5.4.20.0100.04316.46
5.4.10.0100.07316.29
5.4.00.0130.06715.84
5.3.290.0000.07014.65
5.3.280.0070.04314.56
5.3.270.0000.05014.70
5.3.260.0100.04314.63
5.3.250.0030.04714.70
5.3.240.0100.07714.79
5.3.230.0100.08314.61
5.3.220.0070.07714.75
5.3.210.0070.07714.57
5.3.200.0030.05714.56
5.3.190.0070.04314.70
5.3.180.0030.04714.59
5.3.170.0100.07014.61
5.3.160.0100.07014.57
5.3.150.0130.05714.67
5.3.140.0000.05014.55
5.3.130.0100.06714.71
5.3.120.0030.09014.58
5.3.110.0170.04714.55
5.3.100.0130.07314.07
5.3.90.0030.08314.18
5.3.80.0100.07314.13
5.3.70.0070.07714.20
5.3.60.0170.05714.15
5.3.50.0030.06313.92
5.3.40.0070.08014.11
5.3.30.0030.05314.02
5.3.20.0070.03313.65
5.3.10.0030.05313.76
5.3.00.0070.07013.77
5.2.170.0000.06312.41
5.2.160.0070.06312.41
5.2.150.0100.05712.41
5.2.140.0030.04312.41
5.2.130.0070.02312.41
5.2.120.0030.02712.41
5.2.110.0030.03012.41
5.2.100.0030.03012.41
5.2.90.0000.03312.41
5.2.80.0130.02012.41
5.2.70.0070.02712.41
5.2.60.0000.03012.41
5.2.50.0000.03012.41
5.2.40.0000.04312.41
5.2.30.0070.02712.41
5.2.20.0030.03012.41
5.2.10.0030.02712.41
5.2.00.0070.02712.41
5.1.60.0070.02312.41
5.1.50.0030.02312.41
5.1.40.0000.02712.41
5.1.30.0000.04012.41
5.1.20.0030.02712.41
5.1.10.0030.02312.41
5.1.00.0000.02712.41
5.0.50.0000.02712.41
5.0.40.0000.02712.41
5.0.30.0030.05012.41
5.0.20.0070.01712.41
5.0.10.0030.01712.41
5.0.00.0000.03312.41
4.4.90.0030.01312.41
4.4.80.0030.01312.41
4.4.70.0000.01712.41
4.4.60.0000.01712.41
4.4.50.0000.01712.41
4.4.40.0000.04012.41
4.4.30.0000.01712.41
4.4.20.0000.02012.41
4.4.10.0070.01012.41
4.4.00.0000.04012.41
4.3.110.0000.02712.41
4.3.100.0000.01712.41
4.3.90.0000.01712.41
4.3.80.0000.04012.41
4.3.70.0030.02312.41
4.3.60.0000.01712.41
4.3.50.0070.03012.41
4.3.40.0000.02312.41
4.3.30.0000.02712.41
4.3.20.0030.01312.41
4.3.10.0000.01712.41
4.3.00.0000.01712.41

preferences:
42.51 ms | 401 KiB | 5 Q