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run code in 300+ PHP versions simultaneously
<?php class SudokuSolver { const NUMBERS = "123456789"; protected $sudokuColumns; public function __construct ($sudoku) { $this->sudokuColumns = $sudoku; } // could be static as well public function printOut ($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) { $this->checkRow($rowIndex,$row); } } protected function checkRow ($rowIndex, $row) { $numbers = self::NUMBERS; echo "checking $rowIndex..\n"; foreach ($row as $column) { if (false === strpos($column,$numbers)) { return false; } $numbers = str_replace($col,'',$numbers); } return true; } } $sudoku = array(); $sudoku[] = array(null,3,null, null,null,null, null,null,null); $sudoku[] = array(null,null,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)
8.3.60.0100.01318.55
8.3.50.0190.00521.02
8.3.40.0060.00918.91
8.3.30.0070.01420.29
8.3.20.0040.00420.16
8.3.10.0050.00321.95
8.3.00.0040.00422.39
8.2.180.0120.00916.75
8.2.170.0100.01022.96
8.2.160.0100.00320.52
8.2.150.0040.00424.18
8.2.140.0060.00324.66
8.2.130.0040.00426.16
8.2.120.0090.00019.52
8.2.110.0130.01022.27
8.2.100.0080.00419.21
8.2.90.0050.00319.26
8.2.80.0040.00419.38
8.2.70.0030.00717.63
8.2.60.0040.00418.03
8.2.50.0040.00418.07
8.2.40.0000.00818.34
8.2.30.0050.00318.10
8.2.20.0000.00817.73
8.2.10.0040.00417.83
8.2.00.0040.00417.80
8.1.280.0110.01125.92
8.1.270.0000.00824.66
8.1.260.0080.00026.35
8.1.250.0000.00828.09
8.1.240.0090.00023.79
8.1.230.0030.00818.97
8.1.220.0030.00517.74
8.1.210.0090.00018.77
8.1.200.0070.00317.48
8.1.190.0080.00017.68
8.1.180.0080.00020.06
8.1.170.0040.00418.58
8.1.160.0000.00822.19
8.1.150.0000.00818.62
8.1.140.0060.00317.47
8.1.130.0030.00517.85
8.1.120.0040.00417.50
8.1.110.0040.00417.46
8.1.100.0080.00017.51
8.1.90.0040.00417.41
8.1.80.0080.00017.52
8.1.70.0030.00317.38
8.1.60.0030.00617.61
8.1.50.0040.00417.43
8.1.40.0040.00417.43
8.1.30.0000.00917.69
8.1.20.0030.00517.67
8.1.10.0000.00717.61
8.1.00.0000.00817.50
8.0.300.0000.00918.77
8.0.290.0000.00717.17
8.0.280.0070.00018.41
8.0.270.0040.00417.19
8.0.260.0000.00716.84
8.0.250.0000.00817.00
8.0.240.0040.00416.87
8.0.230.0040.00416.95
8.0.220.0000.00716.98
8.0.210.0000.00716.89
8.0.200.0000.00716.95
8.0.190.0040.00416.98
8.0.180.0040.00416.89
8.0.170.0000.00816.85
8.0.160.0040.00416.98
8.0.150.0050.00316.94
8.0.140.0050.00316.77
8.0.130.0000.00513.34
8.0.120.0050.00316.88
8.0.110.0000.00816.93
8.0.100.0000.00716.77
8.0.90.0040.00416.98
8.0.80.0120.01316.96
8.0.70.0030.00516.76
8.0.60.0000.00717.03
8.0.50.0040.00416.88
8.0.30.0080.01217.22
8.0.20.0130.00717.40
8.0.10.0000.00717.00
8.0.00.0130.00817.01
7.4.330.0050.00015.00
7.4.320.0000.00616.53
7.4.300.0000.00716.42
7.4.290.0070.00016.61
7.4.280.0070.00016.64
7.4.270.0000.00716.64
7.4.260.0040.00416.41
7.4.250.0040.00416.49
7.4.240.0030.00416.52
7.4.230.0030.00316.70
7.4.220.0070.01316.73
7.4.210.0050.01216.59
7.4.200.0040.00416.52
7.4.190.0000.00716.48
7.4.160.0110.00616.36
7.4.150.0100.01017.40
7.4.140.0150.00817.86
7.4.130.0110.00916.68
7.4.120.0130.00516.57
7.4.110.0050.01316.60
7.4.100.0110.00816.41
7.4.90.0050.01316.61
7.4.80.0100.00919.39
7.4.70.0140.00316.49
7.4.60.0060.01216.44
7.4.50.0050.00016.61
7.4.40.0050.00522.77
7.4.30.0140.00416.33
7.4.00.0100.00615.19
7.3.330.0030.00313.38
7.3.320.0030.00213.17
7.3.310.0070.00016.40
7.3.300.0030.00316.43
7.3.290.0120.00416.34
7.3.280.0070.00916.38
7.3.270.0160.00317.40
7.3.260.0120.00916.36
7.3.250.0150.00316.44
7.3.240.0160.00416.51
7.3.230.0060.01216.47
7.3.210.0150.00316.37
7.3.200.0090.00619.39
7.3.190.0070.01116.45
7.3.180.0000.01716.41
7.3.170.0090.00916.48
7.3.160.0060.01116.59
7.3.120.0000.01314.84
7.2.330.0110.01116.50
7.2.320.0090.01216.60
7.2.310.0070.01016.74
7.2.300.0000.01816.71
7.2.290.0070.01116.78
7.2.00.0070.00719.57
7.1.100.0060.00618.18
7.1.70.0000.00717.34
7.1.60.0110.01119.21
7.1.50.0150.00617.05
7.1.00.0030.04322.37
7.0.200.0390.00414.78
7.0.140.0030.07721.99
7.0.100.0070.04020.10
7.0.90.0030.04320.17
7.0.80.0030.04719.89
7.0.70.0070.05020.00
7.0.60.0070.07020.01
7.0.50.0000.07720.34
7.0.40.0030.05019.95
7.0.30.0070.04020.15
7.0.20.0030.05320.15
7.0.10.0000.04720.14
7.0.00.0030.04320.18
5.6.280.0000.07721.16
5.6.250.0130.06320.63
5.6.240.0070.05720.64
5.6.230.0000.05320.75
5.6.220.0100.03320.53
5.6.210.0030.04320.53
5.6.200.0100.08021.10
5.6.190.0030.05021.03
5.6.180.0100.07721.18
5.6.170.0070.04320.97
5.6.160.0070.03721.21
5.6.150.0030.04320.97
5.6.140.0070.03321.08
5.6.130.0100.06721.14
5.6.120.0070.04321.11
5.6.110.0100.04020.98
5.6.100.0030.04321.06
5.6.90.0030.04021.06
5.6.80.0070.03720.60
5.6.70.0000.04320.45
5.6.60.0100.04320.41
5.6.50.0170.05020.50
5.6.40.0130.06020.49
5.6.30.0100.08020.48
5.6.20.0070.07020.34
5.6.10.0100.07020.54
5.6.00.0130.06720.31
5.5.380.0000.04720.46
5.5.370.0030.04020.52
5.5.360.0000.04320.54
5.5.350.0030.04320.46
5.5.340.0070.03720.96
5.5.330.0070.05720.92
5.5.320.0070.08720.96
5.5.310.0070.04020.92
5.5.300.0030.04020.94
5.5.290.0070.03720.89
5.5.280.0000.04720.90
5.5.270.0070.04320.79
5.5.260.0070.04020.76
5.5.250.0100.03320.72
5.5.240.0070.03720.30
5.5.230.0030.04020.19
5.5.220.0070.07320.21
5.5.210.0000.04720.28
5.5.200.0100.06720.17
5.5.190.0070.07320.30
5.5.180.0130.07320.23
5.5.160.0070.07720.03
5.5.150.0100.08320.16
5.5.140.0030.06320.27
5.5.130.0100.07020.11
5.5.120.0200.06720.15
5.5.110.0100.07020.15
5.5.100.0070.07720.14
5.5.90.0100.07320.09
5.5.80.0100.08320.14
5.5.70.0030.05020.04
5.5.60.0170.03720.00
5.5.50.0000.05319.98
5.5.40.0130.07020.07
5.5.30.0100.06720.09
5.5.20.0170.07020.09
5.5.10.0070.05020.07
5.5.00.0030.08020.07
5.4.450.0000.07319.28
5.4.440.0070.03319.36
5.4.430.0030.04019.36
5.4.420.0070.04019.20
5.4.410.0100.03019.05
5.4.400.0070.05318.91
5.4.390.0170.03719.04
5.4.380.0000.04019.05
5.4.370.0100.07018.95
5.4.360.0000.04719.21
5.4.350.0170.07019.13
5.4.340.0000.08319.14
5.4.320.0100.04018.90
5.4.310.0100.04719.05
5.4.300.0100.07718.90
5.4.290.0170.06019.04
5.4.280.0070.08018.91
5.4.270.0070.04319.16
5.4.260.0130.07019.16
5.4.250.0130.07019.04
5.4.240.0070.07318.88
5.4.230.0100.06719.13
5.4.220.0030.06319.02
5.4.210.0100.07319.21
5.4.200.0100.06719.14
5.4.190.0030.06719.20
5.4.180.0070.07319.09
5.4.170.0170.07019.23
5.4.160.0000.08319.02
5.4.150.0030.07318.94
5.4.140.0100.07016.47
5.4.130.0100.06716.45
5.4.120.0070.04316.47
5.4.110.0070.07316.49
5.4.100.0000.07316.53
5.4.90.0100.06716.39
5.4.80.0070.06716.51
5.4.70.0070.07316.32
5.4.60.0130.07016.37
5.4.50.0070.07016.41
5.4.40.0030.07716.30
5.4.30.0100.06316.49
5.4.20.0070.07016.54
5.4.10.0100.07016.35
5.4.00.0030.07715.91
5.3.290.0070.07314.80
5.3.280.0100.07314.54
5.3.270.0100.06714.77
5.3.260.0070.07714.70
5.3.250.0200.03314.57
5.3.240.0030.05014.59
5.3.230.0000.07314.78
5.3.220.0130.07014.73
5.3.210.0170.06714.54
5.3.200.0070.04714.60
5.3.190.0030.08014.75
5.3.180.0100.07714.63
5.3.170.0100.06014.59
5.3.160.0000.08714.55
5.3.150.0000.08314.64
5.3.140.0100.07314.66
5.3.130.0000.05714.66
5.3.120.0070.04014.65
5.3.110.0130.07014.68
5.3.100.0070.06314.11
5.3.90.0100.07714.12
5.3.80.0200.05714.05
5.3.70.0070.07714.05
5.3.60.0100.07014.11
5.3.50.0100.07014.06
5.3.40.0100.07013.98
5.3.30.0070.05314.09
5.3.20.0100.06713.75
5.3.10.0100.06713.82
5.3.00.0030.07713.72
5.2.170.0070.06012.13
5.2.160.0030.06312.13
5.2.150.0070.06012.13
5.2.140.0070.06012.13
5.2.130.0070.06012.13
5.2.120.0100.05712.13
5.2.110.0170.04712.13
5.2.100.0070.05712.13
5.2.90.0000.06312.13
5.2.80.0070.06312.13
5.2.70.0070.06012.13
5.2.60.0070.04012.13
5.2.50.0100.06712.13
5.2.40.0070.03312.13
5.2.30.0100.06312.13
5.2.20.0030.06012.13
5.2.10.0070.06012.13
5.2.00.0070.05712.13
5.1.60.0070.05312.13
5.1.50.0070.05312.13
5.1.40.0030.05312.13
5.1.30.0030.02712.13
5.1.20.0030.04012.13
5.1.10.0130.04712.13
5.1.00.0030.05712.13
5.0.50.0000.04712.13
5.0.40.0070.04312.13
5.0.30.0030.05312.13
5.0.20.0030.05012.13
5.0.10.0000.04012.13
5.0.00.0000.07312.13
4.4.90.0030.03012.13
4.4.80.0030.03312.13
4.4.70.0000.03712.13
4.4.60.0000.03712.13
4.4.50.0030.03312.13
4.4.40.0030.05312.13
4.4.30.0000.04012.13
4.4.20.0030.03712.13
4.4.10.0000.02712.13
4.4.00.0100.05012.13
4.3.110.0070.02312.13
4.3.100.0070.03012.13
4.3.90.0030.03312.13
4.3.80.0030.04012.13
4.3.70.0000.03312.13
4.3.60.0030.02312.13
4.3.50.0100.02712.13
4.3.40.0000.06312.13
4.3.30.0030.03312.13
4.3.20.0030.03312.13
4.3.10.0070.03012.13
4.3.00.0030.02712.13

preferences:
39.03 ms | 401 KiB | 5 Q