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run code in 300+ PHP versions simultaneously
<?php class SudokuSolver { 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 $row) { $this->checkRow($rowIndex); } } protected function checkRow ($rowIndex) { echo "checking $rowIndex..\n"; } } $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)
8.3.60.0140.00018.43
8.3.50.0130.00721.20
8.3.40.0060.00918.92
8.3.30.0110.00418.91
8.3.20.0060.00318.95
8.3.10.0030.00521.09
8.3.00.0080.00021.90
8.2.180.0120.00916.75
8.2.170.0040.01222.96
8.2.160.0100.01020.57
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0080.00021.11
8.2.110.0090.00020.93
8.2.100.0120.00017.78
8.2.90.0080.00019.35
8.2.80.0060.00317.97
8.2.70.0030.01017.75
8.2.60.0040.00417.93
8.2.50.0060.00318.10
8.2.40.0080.00018.16
8.2.30.0030.00621.28
8.2.20.0040.00417.64
8.2.10.0050.00217.82
8.2.00.0050.00317.76
8.1.280.0180.00025.92
8.1.270.0070.00023.99
8.1.260.0160.00326.35
8.1.250.0050.00328.09
8.1.240.0060.00319.72
8.1.230.0080.00417.95
8.1.220.0030.00617.79
8.1.210.0070.00418.77
8.1.200.0070.00417.48
8.1.190.0060.00317.23
8.1.180.0050.00318.10
8.1.170.0030.00518.56
8.1.160.0030.00518.77
8.1.150.0040.00418.72
8.1.140.0060.00317.44
8.1.130.0070.00017.82
8.1.120.0000.00817.48
8.1.110.0050.00217.41
8.1.100.0070.00017.50
8.1.90.0050.00217.50
8.1.80.0040.00417.48
8.1.70.0050.00217.52
8.1.60.0000.00817.64
8.1.50.0040.00417.42
8.1.40.0050.00317.57
8.1.30.0000.00817.70
8.1.20.0030.00517.59
8.1.10.0000.00817.62
8.1.00.0060.00317.55
8.0.300.0030.00618.77
8.0.290.0030.00616.88
8.0.280.0070.00018.47
8.0.270.0000.00717.17
8.0.260.0040.00416.73
8.0.250.0000.00716.89
8.0.240.0050.00316.88
8.0.230.0000.00716.90
8.0.220.0000.00716.92
8.0.210.0070.00016.91
8.0.200.0000.00616.88
8.0.190.0050.00216.88
8.0.180.0080.00016.94
8.0.170.0070.00016.86
8.0.160.0040.00416.82
8.0.150.0000.00716.91
8.0.140.0000.00816.82
8.0.130.0050.00313.46
8.0.120.0050.00316.87
8.0.110.0080.00016.87
8.0.100.0040.00416.80
8.0.90.0040.00416.80
8.0.80.0060.00916.92
8.0.70.0000.00716.75
8.0.60.0040.00417.05
8.0.50.0000.00816.91
8.0.30.0090.01117.07
8.0.20.0040.01617.40
8.0.10.0000.00717.10
8.0.00.0100.01016.70
7.4.330.0050.00014.65
7.4.320.0000.00616.66
7.4.300.0040.00416.64
7.4.290.0030.00316.64
7.4.280.0040.00416.66
7.4.270.0030.00316.57
7.4.260.0000.00713.28
7.4.250.0040.00416.60
7.4.240.0000.00716.48
7.4.230.0000.00816.67
7.4.220.0130.01016.63
7.4.210.0060.00916.65
7.4.200.0040.00416.43
7.4.190.0050.00316.60
7.4.160.0130.00316.73
7.4.150.0130.00717.40
7.4.140.0090.00917.86
7.4.130.0110.00816.57
7.4.120.0100.00816.56
7.4.110.0150.00316.54
7.4.100.0110.00816.39
7.4.90.0180.00616.39
7.4.80.0110.00719.39
7.4.70.0100.00716.69
7.4.60.0120.00616.39
7.4.50.0040.00416.39
7.4.40.0040.01422.77
7.4.30.0090.00916.37
7.4.10.0120.00314.76
7.4.00.0090.00815.02
7.3.330.0030.00313.45
7.3.320.0000.00613.30
7.3.310.0050.00216.43
7.3.300.0030.00316.42
7.3.290.0040.01016.40
7.3.280.0090.00816.37
7.3.270.0070.01117.40
7.3.260.0110.01018.24
7.3.250.0120.00716.52
7.3.240.0160.00616.71
7.3.230.0030.01516.66
7.3.210.0160.00416.33
7.3.200.0130.00719.39
7.3.190.0070.01116.43
7.3.180.0150.00316.68
7.3.170.0030.01316.60
7.3.160.0070.01016.46
7.3.130.0160.00314.81
7.3.120.0080.00814.71
7.3.110.0090.00814.93
7.3.100.0070.00714.91
7.3.90.0080.00814.89
7.3.80.0090.00514.96
7.3.70.0090.00614.80
7.3.60.0060.00614.72
7.3.50.0070.00514.91
7.3.40.0090.00514.84
7.3.30.0050.00714.88
7.3.20.0080.00416.58
7.3.10.0100.00616.59
7.3.00.0090.00716.51
7.2.330.0080.01216.58
7.2.320.0110.00716.95
7.2.310.0150.00916.85
7.2.300.0070.01016.52
7.2.290.0040.01916.92
7.2.260.0030.01015.25
7.2.250.0050.01415.22
7.2.240.0090.00914.92
7.2.230.0110.00515.13
7.2.220.0050.00915.06
7.2.210.0020.01014.86
7.2.200.0050.01115.13
7.2.190.0060.00615.09
7.2.180.0020.01114.95
7.2.170.0070.00715.17
7.2.160.0090.00615.07
7.2.150.0070.00717.02
7.2.140.0070.00716.97
7.2.130.0070.00816.94
7.2.120.0060.01016.69
7.2.110.0040.01116.80
7.2.100.0090.00916.67
7.2.90.0020.01116.92
7.2.80.0080.00816.68
7.2.70.0070.01016.82
7.2.60.0100.00816.96
7.2.50.0040.01116.88
7.2.40.0110.00616.90
7.2.30.0070.00816.82
7.2.20.0050.01216.75
7.2.10.0100.00516.89
7.2.00.0060.00916.98
7.1.330.0080.00515.73
7.1.320.0060.00815.66
7.1.310.0050.00915.75
7.1.300.0040.00715.82
7.1.290.0080.00615.91
7.1.280.0090.00515.87
7.1.270.0010.01015.96
7.1.260.0000.01115.92
7.1.250.0090.00815.63
7.1.240.0090.00615.84
7.1.230.0030.00615.61
7.1.220.0050.00815.89
7.1.210.0030.01015.80
7.1.200.0100.00815.41
7.1.190.0030.01015.75
7.1.180.0070.00715.76
7.1.170.0070.00715.91
7.1.160.0030.00915.71
7.1.150.0100.00315.95
7.1.140.0040.01115.86
7.1.130.0040.01415.98
7.1.120.0060.00315.68
7.1.110.0040.01115.85
7.1.100.0060.00916.79
7.1.90.0120.00315.71
7.1.80.0040.00815.68
7.1.70.0040.00416.60
7.1.60.0100.00817.53
7.1.50.0040.01616.46
7.1.40.0030.00715.73
7.1.30.0040.00415.90
7.1.20.0090.00015.65
7.1.10.0000.01415.79
7.1.00.0100.01718.88
7.0.330.0070.00315.10
7.0.320.0080.00615.25
7.0.310.0060.00915.48
7.0.300.0060.01015.45
7.0.290.0030.01015.29
7.0.280.0100.00015.61
7.0.270.0060.00715.28
7.0.260.0040.00415.23
7.0.250.0040.00715.11
7.0.240.0100.00315.59
7.0.230.0090.00915.61
7.0.220.0030.01015.23
7.0.210.0000.01515.41
7.0.200.0040.00516.08
7.0.190.0090.00315.22
7.0.180.0110.00415.47
7.0.170.0100.00315.51
7.0.160.0040.00715.54
7.0.150.0110.00015.54
7.0.140.0050.03918.74
7.0.130.0040.00415.37
7.0.120.0040.01115.56
7.0.110.0070.00415.53
7.0.100.0100.00315.25
7.0.90.0000.01015.48
7.0.80.0030.00615.34
7.0.70.0030.05017.77
7.0.60.0110.03817.69
7.0.50.0030.05217.80
7.0.40.0050.05016.77
7.0.30.0060.04816.70
7.0.20.0080.04316.76
7.0.10.0080.04416.71
7.0.00.0050.03516.79
5.6.400.0030.01214.68
5.6.390.0060.00614.62
5.6.380.0000.00914.70
5.6.370.0070.01114.36
5.6.360.0120.00314.72
5.6.350.0000.00914.26
5.6.340.0060.00914.97
5.6.330.0100.00714.68
5.6.320.0060.01314.25
5.6.310.0040.01114.11
5.6.300.0060.00314.48
5.6.290.0080.00414.89
5.6.280.0040.00714.63
5.6.270.0060.01014.82
5.6.260.0060.00614.48
5.6.250.0030.00714.50
5.6.240.0060.00614.45
5.6.230.0150.00014.60
5.6.220.0070.03517.64
5.6.210.0070.02917.63
5.6.200.0100.04317.89
5.6.190.0100.04617.92
5.6.180.0030.04717.72
5.6.170.0140.04217.79
5.6.160.0070.04517.91
5.6.150.0040.04617.66
5.6.140.0100.04317.65
5.6.130.0070.04317.95
5.6.120.0050.04817.61
5.6.110.0050.04617.90
5.6.100.0100.04517.96
5.6.90.0070.04717.82
5.6.80.0050.04417.43
5.6.70.0050.04517.53
5.6.60.0050.02817.53
5.6.50.0060.03117.52
5.6.40.0060.02317.35
5.6.30.0070.02217.35
5.6.20.0090.04417.40
5.6.10.0050.02217.49
5.6.00.0030.02517.39
5.5.380.0100.00314.44
5.5.370.0070.00714.43
5.5.360.0030.04917.39
5.5.350.0030.03817.44
5.5.340.0030.04617.58
5.5.330.0070.04417.58
5.5.320.0090.03417.75
5.5.310.0030.04617.49
5.5.300.0080.04517.63
5.5.290.0050.04717.63
5.5.280.0180.03617.71
5.5.270.0080.04717.74
5.5.260.0100.04017.60
5.5.250.0060.02817.34
5.5.240.0070.04317.38
5.5.230.0100.04317.22
5.5.220.0070.02217.29
5.5.210.0030.02817.44
5.5.200.0030.02517.34
5.5.190.0060.02317.29
5.5.180.0020.03117.42
5.5.170.0070.00314.64
5.5.160.0050.04317.33
5.5.150.0090.03417.47
5.5.140.0090.04017.36
5.5.130.0080.02817.33
5.5.120.0110.04117.37
5.5.110.0080.02217.36
5.5.100.0000.02617.35
5.5.90.0050.04317.32
5.5.80.0050.02417.24
5.5.70.0080.03417.32
5.5.60.0050.04517.24
5.5.50.0070.02217.19
5.5.40.0080.03217.21
5.5.30.0020.03017.18
5.5.20.0050.03317.33
5.5.10.0030.02417.29
5.5.00.0000.02817.22
5.4.450.0070.03215.29
5.4.440.0080.04515.44
5.4.430.0080.04215.30
5.4.420.0110.03815.36
5.4.410.0050.03515.08
5.4.400.0080.03015.02
5.4.390.0050.04215.10
5.4.380.0040.03415.24
5.4.370.0050.03415.14
5.4.360.0030.02415.11
5.4.350.0020.02315.05
5.4.340.0050.02015.02
5.4.330.0030.00611.29
5.4.320.0030.02215.23
5.4.310.0050.02315.16
5.4.300.0110.03815.24
5.4.290.0030.04115.08
5.4.280.0030.03615.26
5.4.270.0080.03515.25
5.4.260.0090.04015.06
5.4.250.0050.02015.20
5.4.240.0050.02015.15
5.4.230.0020.02614.98
5.4.220.0020.03914.97
5.4.210.0080.02115.09
5.4.200.0020.02515.12
5.4.190.0080.03814.99
5.4.180.0070.03215.21
5.4.170.0030.02015.27
5.4.160.0070.01814.98
5.4.150.0020.02215.03
5.4.140.0020.02413.93
5.4.130.0050.02013.88
5.4.120.0040.02213.95
5.4.110.0050.02513.85
5.4.100.0070.01813.86
5.4.90.0020.02413.84
5.4.80.0040.02413.90
5.4.70.0070.02013.91
5.4.60.0030.02113.82
5.4.50.0050.04213.86
5.4.40.0050.01913.76
5.4.30.0020.02713.85
5.4.20.0080.02813.71
5.4.10.0020.03513.87
5.4.00.0070.01713.60
5.3.290.0050.02212.55
5.3.280.0050.02512.59
5.3.270.0000.02712.67
5.3.260.0080.02012.67
5.3.250.0020.02212.69
5.3.240.0020.02212.60
5.3.230.0000.02312.59
5.3.220.0000.03312.62
5.3.210.0050.04012.59
5.3.200.0020.03212.62
5.3.190.0120.03812.64
5.3.180.0060.02512.56
5.3.170.0050.02012.72
5.3.160.0000.02512.66
5.3.150.0040.02112.67
5.3.140.0030.03012.69
5.3.130.0010.02412.70
5.3.120.0070.03812.63
5.3.110.0080.02012.53
5.3.100.0080.01812.37
5.3.90.0070.02012.40
5.3.80.0050.02212.37
5.3.70.0090.02912.38
5.3.60.0080.03412.40
5.3.50.0080.02312.29
5.3.40.0050.04312.31
5.3.30.0080.03212.33
5.3.20.0070.03912.12
5.3.10.0040.04012.13
5.3.00.0020.03711.88
5.2.170.0100.05311.30
5.2.160.0100.06011.09
5.2.150.0100.03711.20
5.2.140.0100.06011.18
5.2.130.0070.05311.20
5.2.120.0070.06311.04
5.2.110.0030.03711.25
5.2.100.0030.05011.05
5.2.90.0070.03011.05
5.2.80.0100.05311.16
5.2.70.0100.06011.04
5.2.60.0070.06011.15
5.2.50.0100.05711.12
5.2.40.0100.05311.14
5.2.30.0000.06711.12
5.2.20.0070.06010.93
5.2.10.0030.05310.92
5.2.00.0030.05010.92
5.1.60.0030.04710.92
5.1.50.0030.05710.92
5.1.40.0030.05010.92
5.1.30.0000.05310.92
5.1.20.0100.03310.92
5.1.10.0070.04310.92
5.1.00.0030.06010.92
5.0.50.0000.03310.92
5.0.40.0000.03310.92
5.0.30.0030.06010.92
5.0.20.0030.04710.92
5.0.10.0000.04710.92
5.0.00.0000.05710.92
4.4.90.0070.01710.92
4.4.80.0000.03710.92
4.4.70.0000.03710.92
4.4.60.0030.03310.92
4.4.50.0000.03310.92
4.4.40.0030.05010.92
4.4.30.0000.03710.92
4.4.20.0030.03310.92
4.4.10.0000.02710.92
4.4.00.0100.04310.92
4.3.110.0000.04010.92
4.3.100.0000.03710.92
4.3.90.0030.03310.92
4.3.80.0070.03710.92
4.3.70.0000.04010.92
4.3.60.0070.03010.92
4.3.50.0000.04010.92
4.3.40.0030.05010.92
4.3.30.0000.03710.92
4.3.20.0030.03310.92
4.3.10.0000.03310.92
4.3.00.0100.02710.92

preferences:
45.62 ms | 401 KiB | 5 Q