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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 = $this->sudokuColumns; foreach ($columns as $columnIndex => $column) { if (!$this->checkLine($columnIndex,$column)) { return false; } } // 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 => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } // check field -> own method $fields = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { $fields[$rowIndex / 3][$columnIndex + ($rowIndex / 3)] = $cell; } print_r($fields); } foreach ($rows as $rowIndex => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } return true; } protected function checkLine ($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,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)
8.3.60.0040.01518.68
8.3.50.0140.00921.94
8.3.40.0080.00818.84
8.3.30.0180.00019.22
8.3.20.0080.00020.21
8.3.10.0040.00421.83
8.3.00.0080.00022.51
8.2.180.0060.00916.63
8.2.170.0070.01422.96
8.2.160.0070.00721.07
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0030.00626.16
8.2.120.0130.00719.36
8.2.110.0070.00322.02
8.2.100.0090.00318.03
8.2.90.0000.00819.17
8.2.80.0080.00017.97
8.2.70.0000.00817.75
8.2.60.0030.00618.05
8.2.50.0050.00518.07
8.2.40.0080.00018.22
8.2.30.0060.00318.27
8.2.20.0040.00417.64
8.2.10.0030.00517.66
8.2.00.0040.00417.70
8.1.280.0040.01225.92
8.1.270.0040.00423.98
8.1.260.0060.00326.35
8.1.250.0080.00028.09
8.1.240.0050.00523.84
8.1.230.0060.00619.09
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0030.00617.25
8.1.190.0000.00817.40
8.1.180.0030.00618.10
8.1.170.0050.00318.57
8.1.160.0040.00422.10
8.1.150.0040.00418.69
8.1.140.0040.00417.48
8.1.130.0000.00717.91
8.1.120.0000.00717.42
8.1.110.0030.00617.44
8.1.100.0040.00417.53
8.1.90.0050.00317.39
8.1.80.0040.00417.55
8.1.70.0040.00417.40
8.1.60.0030.00617.66
8.1.50.0030.00517.46
8.1.40.0040.00417.46
8.1.30.0060.00317.67
8.1.20.0030.00517.70
8.1.10.0040.00417.65
8.1.00.0040.00417.54
8.0.300.0000.00818.77
8.0.290.0040.00417.16
8.0.280.0000.00718.54
8.0.270.0070.00017.29
8.0.260.0030.00516.77
8.0.250.0030.00317.06
8.0.240.0000.00916.86
8.0.230.0030.00317.04
8.0.220.0000.00716.87
8.0.210.0000.00716.89
8.0.200.0020.00516.87
8.0.190.0050.00216.91
8.0.180.0040.00416.88
8.0.170.0040.00416.84
8.0.160.0040.00417.00
8.0.150.0080.00017.00
8.0.140.0040.00416.89
8.0.130.0030.00313.34
8.0.120.0080.00016.96
8.0.110.0000.00816.93
8.0.100.0040.00416.79
8.0.90.0000.00716.81
8.0.80.0100.00516.89
8.0.70.0030.00516.95
8.0.60.0040.00416.92
8.0.50.0000.00716.89
8.0.30.0100.01017.02
8.0.20.0080.01217.40
8.0.10.0000.00816.93
8.0.00.0140.00516.63
7.4.330.0050.00015.03
7.4.320.0000.00616.47
7.4.300.0060.00016.46
7.4.290.0050.00316.65
7.4.280.0000.00716.61
7.4.270.0000.00716.50
7.4.260.0030.00316.62
7.4.250.0070.00016.46
7.4.240.0030.00416.60
7.4.230.0030.00616.65
7.4.220.0140.01216.69
7.4.210.0050.01216.66
7.4.200.0080.00016.63
7.4.190.0000.00716.54
7.4.160.0160.00416.54
7.4.150.0150.00617.40
7.4.140.0120.00717.86
7.4.130.0050.01316.62
7.4.120.0190.00116.54
7.4.110.0180.00416.51
7.4.100.0090.00916.57
7.4.90.0070.01116.46
7.4.80.0100.00916.64
7.4.70.0090.00916.61
7.4.60.0060.00916.39
7.4.50.0040.00416.39
7.4.40.0030.01322.77
7.4.30.0110.00616.77
7.4.10.0150.00414.89
7.4.00.0100.00614.90
7.3.330.0000.00613.48
7.3.320.0000.00513.32
7.3.310.0030.00316.30
7.3.300.0030.00316.42
7.3.290.0070.01016.39
7.3.280.0090.00916.36
7.3.270.0070.01617.40
7.3.260.0090.01216.47
7.3.250.0070.01116.50
7.3.240.0030.01516.67
7.3.230.0100.00716.57
7.3.210.0070.01016.36
7.3.200.0030.02019.39
7.3.190.0070.01016.60
7.3.180.0150.00716.37
7.3.170.0070.01016.50
7.3.160.0070.01016.49
7.3.130.0060.01214.69
7.3.120.0070.00915.06
7.3.110.0030.01515.11
7.3.100.0090.00614.95
7.3.90.0110.00714.90
7.3.80.0090.00614.85
7.3.70.0030.01014.96
7.3.60.0030.01314.89
7.3.50.0070.00414.91
7.3.40.0060.01015.02
7.3.30.0000.01114.98
7.3.20.0030.00616.64
7.3.10.0090.00316.75
7.3.00.0070.00716.54
7.2.330.0070.01016.59
7.2.320.0130.00316.89
7.2.310.0180.00616.55
7.2.300.0040.01416.71
7.2.290.0100.01016.77
7.2.260.0070.00715.26
7.2.250.0120.00614.80
7.2.240.0000.01515.27
7.2.230.0070.01014.93
7.2.220.0030.01015.20
7.2.210.0060.00615.03
7.2.200.0070.01014.88
7.2.190.0060.01015.09
7.2.180.0060.01115.18
7.2.170.0070.00715.02
7.2.160.0070.00715.16
7.2.150.0040.01116.94
7.2.140.0110.00316.99
7.2.130.0070.01017.01
7.2.120.0030.01016.77
7.2.110.0000.01016.98
7.2.100.0030.01016.80
7.2.90.0070.01016.91
7.2.80.0000.01117.03
7.2.70.0080.00417.00
7.2.60.0090.00616.94
7.2.50.0030.01216.91
7.2.40.0130.00317.02
7.2.30.0000.01617.04
7.2.20.0040.01416.82
7.2.10.0090.00316.70
7.2.00.0030.01218.21
7.1.330.0090.00615.59
7.1.320.0030.00915.98
7.1.310.0040.00716.14
7.1.300.0110.00415.76
7.1.290.0040.01115.92
7.1.280.0110.00415.72
7.1.270.0030.01315.80
7.1.260.0060.00315.67
7.1.250.0040.01115.79
7.1.240.0000.00915.68
7.1.230.0070.00615.60
7.1.220.0000.01415.88
7.1.210.0040.00715.88
7.1.200.0060.00915.69
7.1.190.0080.00415.77
7.1.180.0040.01115.83
7.1.170.0070.01015.49
7.1.160.0000.01115.73
7.1.150.0070.00415.82
7.1.140.0090.00615.82
7.1.130.0040.00715.93
7.1.120.0060.00315.80
7.1.110.0060.00915.96
7.1.100.0040.00816.79
7.1.90.0000.01115.54
7.1.80.0030.01015.89
7.1.70.0050.00816.41
7.1.60.0020.01917.56
7.1.50.0080.00816.30
7.1.40.0000.00915.98
7.1.30.0030.00615.64
7.1.20.0070.00315.76
7.1.10.0070.00715.66
7.1.00.0080.04019.04
7.0.330.0150.00515.34
7.0.320.0100.01015.33
7.0.310.0090.00915.25
7.0.300.0070.00415.07
7.0.290.0090.00615.26
7.0.280.0130.00615.35
7.0.270.0120.00615.33
7.0.260.0030.01415.26
7.0.250.0140.00415.36
7.0.240.0070.01015.48
7.0.230.0070.01015.26
7.0.220.0120.00415.21
7.0.210.0080.00415.50
7.0.200.0090.00716.13
7.0.190.0130.00715.25
7.0.180.0030.01315.39
7.0.170.0070.01115.46
7.0.160.0090.00915.38
7.0.150.0030.01615.14
7.0.140.0090.03718.71
7.0.130.0070.01315.28
7.0.120.0140.00415.29
7.0.110.0030.00915.62
7.0.100.0080.00415.06
7.0.90.0100.00315.28
7.0.80.0120.00915.36
7.0.70.0060.01215.51
7.0.60.0100.04217.54
7.0.50.0050.03716.64
7.0.40.0110.03316.95
7.0.30.0140.02916.85
7.0.20.0150.03716.79
7.0.10.0100.05016.74
7.0.00.0080.05016.72
5.6.400.0100.00614.54
5.6.390.0060.00614.62
5.6.380.0100.00714.64
5.6.370.0070.01014.36
5.6.360.0070.01114.46
5.6.350.0090.00614.67
5.6.340.0100.01314.68
5.6.330.0070.01014.49
5.6.320.0130.01014.27
5.6.310.0120.00614.31
5.6.300.0070.01414.85
5.6.290.0070.00714.30
5.6.280.0050.04317.50
5.6.270.0100.01014.65
5.6.260.0070.00714.50
5.6.250.0090.00614.22
5.6.240.0070.01014.63
5.6.230.0030.01714.43
5.6.220.0000.02014.46
5.6.210.0080.02217.51
5.6.200.0050.04816.45
5.6.190.0100.02717.49
5.6.180.0210.03817.25
5.6.170.0170.02917.38
5.6.160.0050.03517.48
5.6.150.0040.02816.41
5.6.140.0130.03516.26
5.6.130.0080.04516.38
5.6.120.0110.02617.75
5.6.110.0100.04717.77
5.6.100.0020.05817.69
5.6.90.0100.03217.82
5.6.80.0050.02617.38
5.6.70.1690.01517.42
5.6.60.0060.00614.30
5.6.50.0100.01014.32
5.6.40.0030.00914.55
5.6.30.0110.00814.57
5.6.20.0040.01514.25
5.6.10.0080.00914.27
5.6.00.0060.00914.57
5.5.380.0130.00314.21
5.5.370.0070.00714.75
5.5.360.0130.00614.63
5.5.350.0200.04317.33
5.5.340.0140.03316.22
5.5.330.0060.02617.33
5.5.320.0200.03817.18
5.5.310.0230.03117.39
5.5.300.0070.02716.20
5.5.290.0100.02816.13
5.5.280.0100.04517.79
5.5.270.0130.02217.63
5.5.260.0130.04217.60
5.5.250.0170.02717.54
5.5.240.0280.03517.38
5.5.230.0130.01014.62
5.5.220.0070.01114.18
5.5.210.0080.00814.28
5.5.200.0100.01014.27
5.5.190.0090.01214.62
5.5.180.0040.01514.48
5.5.170.0120.00314.63
5.5.160.0080.00614.32
5.5.150.0090.01214.12
5.5.140.0030.01714.30
5.5.130.0090.00614.14
5.5.120.0100.00714.21
5.5.110.0070.01014.50
5.5.100.0170.00014.55
5.5.90.0070.01114.35
5.5.80.0070.01014.41
5.5.70.0100.01014.39
5.5.60.0140.00414.25
5.5.50.0090.00914.24
5.5.40.0100.01014.62
5.5.30.0060.01014.45
5.5.20.0110.00614.02
5.5.10.0030.01014.36
5.5.00.0070.01414.18
5.4.450.0520.03015.31
5.4.440.0450.04115.36
5.4.430.0180.03015.30
5.4.420.0130.03015.32
5.4.410.0070.03915.07
5.4.400.0080.03214.90
5.4.390.0140.03714.79
5.4.380.0100.03214.94
5.4.370.0180.04015.04
5.4.360.0090.03614.88
5.4.350.0080.03415.05
5.4.340.0100.03514.90
5.4.330.0200.00011.14
5.4.320.0110.02211.98
5.4.310.0100.02511.76
5.4.300.0100.02211.82
5.4.290.0110.02511.75
5.4.280.0070.02211.83
5.4.270.0160.01911.74
5.4.260.0130.02111.81
5.4.250.0090.02311.64
5.4.240.0070.02511.76
5.4.230.0100.02311.79
5.4.220.0090.02411.83
5.4.210.0080.02711.73
5.4.200.0090.02611.82
5.4.190.0080.02211.84
5.4.180.0100.02211.63
5.4.170.0190.02511.83
5.4.160.0120.03211.81
5.4.150.0140.02711.65
5.4.140.0160.03711.77
5.4.130.0130.02811.76
5.4.120.0130.02511.65
5.4.110.0170.02311.66
5.4.100.0220.03711.66
5.4.90.0130.02511.66
5.4.80.0140.02311.50
5.4.70.0210.03511.67
5.4.60.0120.03011.43
5.4.50.0250.04511.58
5.4.40.0120.02611.55
5.4.30.0160.02511.49
5.4.20.0200.02411.48
5.4.10.0150.02611.57
5.4.00.0140.02611.38
5.3.290.0150.02411.76
5.3.280.0120.02411.72
5.3.270.0120.03111.74
5.3.260.0240.03711.80
5.3.250.0160.03011.66
5.3.240.0120.03411.68
5.3.230.0200.02911.71
5.3.220.0170.02611.66
5.3.210.0180.02711.64
5.3.200.0220.02511.58
5.3.190.0220.03711.69
5.3.180.0190.02211.73
5.3.170.0330.04011.60
5.3.160.0180.02411.78
5.3.150.0210.03411.60
5.3.140.0190.02811.73
5.3.130.0160.03111.73
5.3.120.0150.02811.68
5.3.110.0250.05311.71
5.3.100.0190.02811.46
5.3.90.0190.02411.44
5.3.80.0180.02311.29
5.3.70.0230.03311.31
5.3.60.0160.02711.41
5.3.50.0200.02711.36
5.3.40.0130.02811.36
5.3.30.0160.02311.40
5.3.20.0130.02911.21
5.3.10.0150.02611.18
5.3.00.0260.04911.11
5.2.170.0250.0369.28
5.2.160.0190.0399.28
5.2.150.0500.1009.28
5.2.140.0250.0359.28
5.2.130.0530.0699.24
5.2.120.0450.0809.23
5.2.110.0200.0419.24
5.2.100.0460.0999.25
5.2.90.0180.0409.24
5.2.80.0160.0449.23
5.2.70.0270.0409.23
5.2.60.0360.0859.18
5.2.50.0200.0369.16
5.2.40.0240.0389.13
5.2.30.0230.0629.11
5.2.20.0190.0419.11
5.2.10.0160.0399.00
5.2.00.0210.0328.86
5.1.60.0480.0908.14
5.1.50.0150.0338.15
5.1.40.0210.0318.13
5.1.30.0190.0358.48
5.1.20.0150.0418.52
5.1.10.0220.0318.24
5.1.00.0680.1018.24
5.0.50.0170.0256.73
5.0.40.0140.0256.59
5.0.30.0360.0796.41
5.0.20.0160.0246.37
5.0.10.0150.0256.35
5.0.00.0130.0386.34
4.4.90.0080.0184.78
4.4.80.0100.0174.75
4.4.70.0100.0174.76
4.4.60.0100.0174.75
4.4.50.0080.0204.77
4.4.40.0080.0314.71
4.4.30.0080.0204.76
4.4.20.0070.0194.84
4.4.10.0130.0204.85
4.4.00.0080.0334.76
4.3.110.0100.0164.67
4.3.100.0110.0174.66
4.3.90.0240.0664.63
4.3.80.0050.0304.58
4.3.70.0120.0144.63
4.3.60.0080.0194.63
4.3.50.0070.0184.63
4.3.40.0080.0294.54
4.3.30.0060.0203.31
4.3.20.0040.0193.30
4.3.10.0060.0173.25
4.3.00.0200.0206.74

preferences:
69.54 ms | 401 KiB | 5 Q