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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] = (string) $cell; } //$this->printOut($rows); } foreach ($rows as $rowIndex => $row) { var_export($this->checkRow($rowIndex,$row)); } } protected function checkRow ($rowIndex, $row) { $numbers = self::NUMBERS; echo "checking $rowIndex..\n"; foreach ($row as $column) { if (null === $column) { continue; } echo "$column , $numbers\n" . var_export(strpos($numbers,$column),true); if (false === strpos($numbers,$column)) { 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)
8.3.60.0110.01118.40
8.3.50.0170.01021.99
8.3.40.0150.00018.82
8.3.30.0150.00018.76
8.3.20.0080.00018.76
8.3.10.0030.00619.41
8.3.00.0000.00821.75
8.2.180.0120.01216.59
8.2.170.0150.00322.96
8.2.160.0040.01120.37
8.2.150.0130.01024.18
8.2.140.0050.00324.66
8.2.130.0090.00026.16
8.2.120.0040.00421.11
8.2.110.0000.00922.13
8.2.100.0150.00017.84
8.2.90.0050.00319.36
8.2.80.0030.00617.97
8.2.70.0030.00717.63
8.2.60.0040.00418.05
8.2.50.0030.00618.07
8.2.40.0040.00418.34
8.2.30.0040.00419.89
8.2.20.0050.00317.75
8.2.10.0070.00217.75
8.2.00.0050.00317.89
8.1.280.0120.00325.92
8.1.270.0080.00023.99
8.1.260.0110.00426.35
8.1.250.0080.00028.09
8.1.240.0100.00022.42
8.1.230.0050.00520.78
8.1.220.0080.00018.77
8.1.210.0040.00418.88
8.1.200.0060.00317.47
8.1.190.0060.00317.51
8.1.180.0000.00818.10
8.1.170.0040.00418.53
8.1.160.0040.00418.86
8.1.150.0000.00718.73
8.1.140.0000.00817.36
8.1.130.0040.00417.88
8.1.120.0080.00017.38
8.1.110.0060.00317.51
8.1.100.0000.00817.54
8.1.90.0060.00317.50
8.1.80.0000.00817.38
8.1.70.0050.00517.48
8.1.60.0000.00817.64
8.1.50.0030.00617.53
8.1.40.0030.00617.44
8.1.30.0000.00817.68
8.1.20.0000.00917.70
8.1.10.0040.00417.66
8.1.00.0070.00417.48
8.0.300.0030.00620.03
8.0.290.0070.00017.29
8.0.280.0070.00018.41
8.0.270.0040.00417.26
8.0.260.0030.00316.84
8.0.250.0040.00416.96
8.0.240.0000.00816.96
8.0.230.0040.00416.95
8.0.220.0030.00317.00
8.0.210.0040.00416.98
8.0.200.0030.00316.94
8.0.190.0090.00016.94
8.0.180.0000.00716.96
8.0.170.0000.00716.98
8.0.160.0070.00016.88
8.0.150.0060.00316.93
8.0.140.0080.00017.02
8.0.130.0040.00413.37
8.0.120.0080.00016.84
8.0.110.0000.01017.05
8.0.100.0080.00017.04
8.0.90.0000.00716.85
8.0.80.0060.00917.04
8.0.70.0040.00417.01
8.0.60.0050.00317.04
8.0.50.0060.00317.02
8.0.30.0120.00817.16
8.0.20.0130.00717.40
8.0.10.0050.00316.96
8.0.00.0080.01316.90
7.4.330.0000.00514.69
7.4.320.0040.00416.64
7.4.300.0000.00616.50
7.4.290.0070.00016.47
7.4.280.0000.01116.52
7.4.270.0000.00716.58
7.4.260.0060.00013.29
7.4.250.0040.00416.41
7.4.240.0020.00516.68
7.4.230.0030.00316.43
7.4.220.0060.01016.52
7.4.210.0110.00716.65
7.4.200.0070.00016.64
7.4.190.0070.00016.44
7.4.160.0110.00616.60
7.4.150.0170.00817.40
7.4.140.0110.00717.86
7.4.130.0120.00616.48
7.4.120.0140.00516.42
7.4.110.0140.00516.48
7.4.100.0070.01016.67
7.4.90.0090.00916.69
7.4.80.0070.01019.37
7.4.70.0090.00816.63
7.4.60.0100.00616.47
7.4.50.0000.00916.46
7.4.40.0060.00922.27
7.4.30.0090.01216.75
7.4.00.0060.00615.20
7.3.330.0000.00513.46
7.3.320.0030.00313.44
7.3.310.0030.00316.32
7.3.300.0030.00316.34
7.3.290.0030.01016.38
7.3.280.0050.01216.45
7.3.270.0110.00817.40
7.3.260.0120.00818.24
7.3.250.0150.00616.55
7.3.240.0100.01416.53
7.3.230.0060.01216.65
7.3.210.0090.01216.73
7.3.200.0110.00819.39
7.3.190.0120.00416.52
7.3.180.0080.01016.28
7.3.170.0160.00616.52
7.3.160.0060.01016.39
7.3.120.0030.01014.67
7.3.10.0110.00616.22
7.3.00.0190.00316.29
7.2.330.0040.01516.83
7.2.320.0060.01016.93
7.2.310.0150.00316.75
7.2.300.0100.00716.50
7.2.290.0100.00716.84
7.2.130.0120.00316.72
7.2.120.0120.01216.68
7.2.110.0070.00616.88
7.2.100.0120.00616.45
7.2.90.0100.00716.95
7.2.80.0060.00616.86
7.2.70.0130.01016.58
7.2.60.0060.01616.75
7.2.50.0090.01216.93
7.2.40.0110.00816.56
7.2.30.0090.00716.76
7.2.20.0120.00816.99
7.2.10.0120.00616.72
7.2.00.0050.00618.13
7.1.250.0180.00715.71
7.1.200.0030.01215.71
7.1.100.0030.00818.24
7.1.70.0000.01017.14
7.1.60.0040.00717.35
7.1.50.0070.01717.15
7.1.00.0070.08022.45
7.0.200.0060.00916.49
7.0.140.0030.07322.16
7.0.70.0030.08021.64
7.0.60.0000.09021.67
7.0.50.0100.06722.11
7.0.40.0000.05020.09
7.0.30.0000.04320.10
7.0.20.0030.04020.19
7.0.10.0000.04320.17
7.0.00.0000.03720.03
5.6.280.0030.07020.96
5.6.220.0100.04020.64
5.6.210.0070.08020.45
5.6.200.0070.05021.09
5.6.190.0070.03721.14
5.6.180.0030.04021.05
5.6.170.0030.04021.14
5.6.160.0070.02721.04
5.6.150.0000.03321.11
5.6.140.0030.03321.12
5.6.130.0030.03321.06
5.6.120.0030.03320.96
5.6.110.0000.03721.20
5.6.100.0000.04321.04
5.6.90.0030.03321.05
5.6.80.0030.03020.43
5.6.70.0000.03320.49
5.6.60.0000.03320.47
5.6.50.0030.03020.46
5.6.40.0030.03020.41
5.6.30.0030.03020.44
5.6.20.0000.03320.47
5.6.10.0000.03320.45
5.6.00.0070.02720.39
5.5.360.0130.07320.42
5.5.350.0030.08720.32
5.5.340.0030.05720.91
5.5.330.0070.03720.92
5.5.320.0070.04020.93
5.5.310.0070.04020.81
5.5.300.0000.03720.79
5.5.290.0030.03320.80
5.5.280.0000.04020.89
5.5.270.0000.03720.89
5.5.260.0030.03320.91
5.5.250.0070.03720.76
5.5.240.0030.03020.26
5.5.230.0000.03320.33
5.5.220.0030.03020.21
5.5.210.0000.03320.05
5.5.200.0030.03020.12
5.5.190.0000.03320.29
5.5.180.0030.03020.21
5.5.160.0070.02720.12
5.5.150.0070.02720.14
5.5.140.0030.03020.27
5.5.130.0000.03320.29
5.5.120.0000.03320.16
5.5.110.0030.03320.21
5.5.100.0000.03320.13
5.5.90.0030.03020.10
5.5.80.0000.04720.10
5.5.70.0030.05319.96
5.5.60.0100.07020.18
5.5.50.0070.06020.09
5.5.40.0070.08020.09
5.5.30.0000.04720.05
5.5.20.0070.07319.98
5.5.10.0030.07020.07
5.5.00.0030.04020.00
5.4.450.0070.03019.23
5.4.440.0000.03319.49
5.4.430.0070.03719.35
5.4.420.0000.04319.23
5.4.410.0000.03319.28
5.4.400.0000.03019.05
5.4.390.0000.04019.18
5.4.380.0000.03319.18
5.4.370.0030.02718.85
5.4.360.0030.03018.84
5.4.350.0000.03019.03
5.4.340.0000.03319.27
5.4.320.0000.04019.21
5.4.310.0000.03019.10
5.4.300.0030.03019.13
5.4.290.0000.03319.16
5.4.280.0000.03319.02
5.4.270.0000.03319.02
5.4.260.0000.03319.12
5.4.250.0030.03718.94
5.4.240.0030.04718.84
5.4.230.0000.03719.15
5.4.220.0070.04718.81
5.4.210.0070.05019.13
5.4.200.0030.06019.11
5.4.190.0030.04319.02
5.4.180.0030.07718.89
5.4.170.0030.06018.84
5.4.160.0030.06718.83
5.4.150.0000.06719.15
5.4.140.0030.04716.27
5.4.130.0100.06316.25
5.4.120.0030.06716.40
5.4.110.0000.05716.32
5.4.100.0070.07016.49
5.4.90.0030.07716.40
5.4.80.0030.07316.42
5.4.70.0070.05316.39
5.4.60.0030.06316.39
5.4.50.0000.06716.35
5.4.40.0030.06316.44
5.4.30.0000.07316.41
5.4.20.0070.06716.46
5.4.10.0000.07316.49
5.4.00.0030.05015.70
5.3.290.0000.03314.68
5.3.280.0000.06014.63
5.3.270.0070.05014.61
5.3.260.0070.05014.77
5.3.250.0030.06014.66
5.3.240.0070.05714.65
5.3.230.0000.07714.63
5.3.220.0070.05314.68
5.3.210.0000.07314.71
5.3.200.0000.08014.68
5.3.190.0070.07314.62
5.3.180.0100.06014.70
5.3.170.0070.05714.61
5.3.160.0000.07714.59
5.3.150.0100.06714.71
5.3.140.0030.06014.64
5.3.130.0030.05014.60
5.3.120.0000.07314.61
5.3.110.0030.07714.72
5.3.100.0000.07014.05
5.3.90.0030.06014.03
5.3.80.0070.07014.06
5.3.70.0000.07714.21
5.3.60.0030.07013.98
5.3.50.0000.06714.04
5.3.40.0070.06314.05
5.3.30.0070.07313.98
5.3.20.0070.07013.67
5.3.10.0000.07013.82
5.3.00.0030.05013.75
5.2.170.0030.06711.11
5.2.160.0030.04711.11
5.2.150.0100.05711.19
5.2.140.0030.05311.21
5.2.130.0030.06311.27
5.2.120.0070.05011.04
5.2.110.0000.06711.08
5.2.100.0000.05711.25
5.2.90.0000.04011.28
5.2.80.0000.05311.21
5.2.70.0030.06011.26
5.2.60.0030.05011.04
5.2.50.0000.03711.10
5.2.40.0030.06011.04
5.2.30.0100.05311.04
5.2.20.0100.03011.08
5.2.10.0000.04011.04
5.2.00.0070.03711.04
5.1.60.0070.04311.04
5.1.50.0000.05311.04
5.1.40.0030.04711.04
5.1.30.0030.05011.04
5.1.20.0000.04011.04
5.1.10.0000.06011.04
5.1.00.0000.05711.04
5.0.50.0030.04311.04
5.0.40.0030.03311.04
5.0.30.0000.06311.04
5.0.20.0070.04011.04
5.0.10.0030.03311.04
5.0.00.0030.04011.04
4.4.90.0000.03711.04
4.4.80.0030.03711.04
4.4.70.0070.03011.04
4.4.60.0070.03311.04
4.4.50.0000.03311.04
4.4.40.0000.05311.04
4.4.30.0000.03311.04
4.4.20.0030.02011.04
4.4.10.0030.02711.04
4.4.00.0000.04711.04
4.3.110.0030.02711.04
4.3.100.0030.03311.04
4.3.90.0000.03311.04
4.3.80.0000.03011.04
4.3.70.0030.02711.04
4.3.60.0030.02711.04
4.3.50.0000.03011.04
4.3.40.0030.04711.04
4.3.30.0000.03711.04
4.3.20.0030.03011.04
4.3.10.0030.03011.04
4.3.00.0030.02711.04

preferences:
40.18 ms | 401 KiB | 5 Q