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run code in 300+ PHP versions simultaneously
<?php var_export(strpos('123456789', 8)); exit; 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 => $row) { var_export($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)
8.3.60.0040.01216.75
8.3.50.0130.00521.91
8.3.40.0180.00318.75
8.3.30.0140.00018.91
8.3.20.0080.00020.13
8.3.10.0050.00223.48
8.3.00.0050.00520.80
8.2.180.0140.00316.63
8.2.170.0070.00722.96
8.2.160.0100.01020.38
8.2.150.0090.00024.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0030.00619.36
8.2.110.0040.01322.31
8.2.100.0050.00620.50
8.2.90.0080.00019.21
8.2.80.0080.00017.97
8.2.70.0030.00717.63
8.2.60.0000.00817.68
8.2.50.0040.00418.07
8.2.40.0050.00319.75
8.2.30.0040.00418.24
8.2.20.0040.00417.81
8.2.10.0050.00218.09
8.2.00.0040.00417.81
8.1.280.0120.00325.92
8.1.270.0060.00323.84
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0050.00521.93
8.1.230.0060.00619.07
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0030.00617.48
8.1.190.0000.00817.35
8.1.180.0040.00418.10
8.1.170.0040.00418.64
8.1.160.0030.00522.02
8.1.150.0040.00418.49
8.1.140.0040.00417.26
8.1.130.0000.00819.59
8.1.120.0000.00717.25
8.1.110.0050.00317.39
8.1.100.0000.00717.41
8.1.90.0090.00017.43
8.1.80.0000.00717.41
8.1.70.0030.00517.32
8.1.60.0040.00417.39
8.1.50.0040.00417.55
8.1.40.0000.00817.45
8.1.30.0030.00617.57
8.1.20.0040.00417.61
8.1.10.0040.00417.41
8.1.00.0040.00417.49
8.0.300.0040.00418.77
8.0.290.0040.00416.75
8.0.280.0050.00318.30
8.0.270.0030.00317.16
8.0.260.0060.00017.23
8.0.250.0030.00316.98
8.0.240.0040.00416.86
8.0.230.0000.00716.91
8.0.220.0000.00716.96
8.0.210.0030.00516.93
8.0.200.0030.00616.95
8.0.190.0040.00416.82
8.0.180.0060.00316.89
8.0.170.0050.00316.84
8.0.160.0000.00716.89
8.0.150.0000.00716.79
8.0.140.0000.00716.74
8.0.130.0030.00313.31
8.0.120.0040.00416.77
8.0.110.0000.00816.72
8.0.100.0040.00416.95
8.0.90.0070.00016.86
8.0.80.0090.00616.94
8.0.70.0020.00516.79
8.0.60.0040.00416.95
8.0.50.0070.00016.95
8.0.30.0140.00817.17
8.0.20.0120.00617.40
8.0.10.0000.00716.80
8.0.00.0090.01016.82
7.4.330.0000.00515.03
7.4.320.0030.00316.40
7.4.300.0030.00316.48
7.4.290.0050.00516.54
7.4.280.0080.00016.55
7.4.270.0000.00716.52
7.4.260.0030.00516.47
7.4.250.0030.00316.27
7.4.240.0020.00516.41
7.4.230.0000.00816.38
7.4.220.0060.01316.58
7.4.210.0130.00716.48
7.4.200.0000.00716.46
7.4.160.0080.00816.36
7.4.150.0070.01117.40
7.4.140.0100.00717.86
7.4.130.0080.01016.53
7.4.120.0110.00616.45
7.4.110.0060.01216.36
7.4.100.0100.00716.54
7.4.90.0110.00916.47
7.4.80.0030.01419.39
7.4.70.0100.01316.39
7.4.60.0120.00916.31
7.4.50.0000.00516.39
7.4.40.0100.00616.49
7.4.30.0060.00916.55
7.4.10.0030.01315.02
7.4.00.0070.00914.77
7.3.330.0030.00313.16
7.3.320.0000.00613.31
7.3.310.0070.00016.27
7.3.300.0000.00716.27
7.3.290.0140.00316.24
7.3.280.0100.00816.24
7.3.270.0030.01717.40
7.3.260.0070.01116.50
7.3.250.0060.01216.36
7.3.240.0080.01516.48
7.3.230.0190.00516.39
7.3.210.0090.00916.34
7.3.200.0070.01119.39
7.3.190.0150.00316.27
7.3.180.0040.01216.42
7.3.170.0100.00716.57
7.3.160.0080.00916.53
7.3.130.0000.01514.53
7.3.120.0040.01214.94
7.3.110.0110.00714.95
7.3.100.0070.00414.99
7.3.90.0000.01814.70
7.3.80.0040.00814.89
7.3.70.0060.00714.34
7.3.60.0060.00914.57
7.3.50.0030.01314.64
7.3.40.0030.01214.55
7.3.30.0070.00714.79
7.3.20.0100.00716.70
7.3.10.0100.00316.42
7.3.00.0000.01016.49
7.2.330.0050.01416.43
7.2.320.0090.00916.26
7.2.310.0070.01516.52
7.2.300.0060.01016.39
7.2.290.0170.00716.65
7.2.260.0030.01614.86
7.2.250.0090.00914.59
7.2.240.0060.00914.91
7.2.230.0120.00414.67
7.2.220.0040.01114.90
7.2.210.0070.01115.11
7.2.200.0100.00014.89
7.2.190.0070.00714.62
7.2.180.0070.00714.92
7.2.170.0070.01015.05
7.2.160.0090.00615.02
7.2.150.0030.01316.64
7.2.140.0000.00916.54
7.2.130.0040.00916.50
7.2.120.0110.00316.65
7.2.110.0070.01016.71
7.2.100.0040.00816.48
7.2.90.0090.00616.99
7.2.80.0100.00716.55
7.2.70.0060.01016.65
7.2.60.0050.00916.83
7.2.50.0000.02016.83
7.2.40.0000.01217.03
7.2.30.0070.01116.79
7.2.20.0030.01016.76
7.2.10.0070.01316.68
7.2.00.0060.01017.82
7.1.330.0120.00315.72
7.1.320.0070.01015.76
7.1.310.0080.00515.44
7.1.300.0070.00715.67
7.1.290.0100.00715.74
7.1.280.0030.01015.67
7.1.270.0000.01315.62
7.1.260.0000.00915.70
7.1.250.0000.01015.77
7.1.240.0080.00315.86
7.1.230.0070.01015.75
7.1.220.0000.01515.55
7.1.210.0060.00615.78
7.1.200.0110.00315.61
7.1.190.0000.01515.88
7.1.180.0000.01615.90
7.1.170.0100.01015.47
7.1.160.0090.00615.76
7.1.150.0000.01015.57
7.1.140.0070.01115.89
7.1.130.0100.00615.68
7.1.120.0080.00615.70
7.1.110.0000.01615.61
7.1.100.0070.01116.63
7.1.90.0040.00815.72
7.1.80.0070.00715.86
7.1.70.0020.01116.31
7.1.60.0120.00717.78
7.1.50.0080.01316.08
7.1.40.0070.00715.78
7.1.30.0070.00715.79
7.1.20.0040.01215.61
7.1.10.0000.01015.57
7.1.00.0030.04019.06
7.0.330.0100.00615.45
7.0.320.0050.00815.22
7.0.310.0120.00015.32
7.0.300.0000.01215.35
7.0.290.0030.01015.37
7.0.280.0030.01015.14
7.0.270.0030.01315.48
7.0.260.0030.01015.12
7.0.250.0030.00715.52
7.0.240.0050.00515.48
7.0.230.0060.00315.53
7.0.220.0070.00715.42
7.0.210.0040.01115.27
7.0.200.0050.00716.06
7.0.190.0130.00315.43
7.0.180.0050.00515.32
7.0.170.0060.00615.46
7.0.160.0070.00715.43
7.0.150.0120.00015.47
7.0.140.0070.03818.59
7.0.130.0090.00615.43
7.0.120.0030.01315.30
7.0.110.0070.00715.18
7.0.100.0060.00615.34
7.0.90.0060.00615.33
7.0.80.0030.01315.13
7.0.70.0090.00315.22
7.0.60.0060.01818.44
7.0.50.0040.02018.82
7.0.40.0090.02016.75
7.0.30.0020.02616.77
7.0.20.0020.03216.76
7.0.10.0050.02616.76
7.0.00.0040.04516.75
5.6.400.0030.01214.38
5.6.390.0030.01014.58
5.6.380.0040.00814.00
5.6.370.0000.01414.32
5.6.360.0100.00014.21
5.6.350.0070.00713.88
5.6.340.0030.01614.43
5.6.330.0110.00414.34
5.6.320.0000.01414.54
5.6.310.0070.01114.16
5.6.300.0070.00714.32
5.6.290.0030.00914.41
5.6.280.0020.04317.61
5.6.270.0000.00814.01
5.6.260.0000.01514.13
5.6.250.0070.00714.35
5.6.240.0060.00914.16
5.6.230.0030.01014.09
5.6.220.0090.00613.95
5.6.210.0050.01817.43
5.6.200.0030.02817.66
5.6.190.0050.01817.67
5.6.180.0050.02517.55
5.6.170.0050.02517.54
5.6.160.0060.03317.59
5.6.150.0030.04817.71
5.6.140.0050.02317.81
5.6.130.0080.04517.66
5.6.120.0080.04217.59
5.6.110.0130.03817.72
5.6.100.0030.04317.51
5.6.90.0100.03217.71
5.6.80.0100.03817.22
5.6.70.0000.04717.16
5.6.60.0060.03817.37
5.6.50.0030.04417.07
5.6.40.0050.04417.36
5.6.30.0080.04117.26
5.6.20.0060.04317.27
5.6.10.0070.04217.25
5.6.00.0050.04517.17
5.5.380.0100.00613.80
5.5.370.0040.01114.07
5.5.360.0080.00513.84
5.5.350.0060.01817.18
5.5.340.0080.02317.66
5.5.330.0060.01717.63
5.5.320.0040.02117.66
5.5.310.0080.01717.52
5.5.300.0110.01617.55
5.5.290.0020.02817.58
5.5.280.0050.04217.36
5.5.270.0060.04217.42
5.5.260.0070.03217.40
5.5.250.0040.04617.31
5.5.240.0090.04217.03
5.5.230.0030.04316.95
5.5.220.0080.03017.14
5.5.210.0030.04217.06
5.5.200.0030.02817.02
5.5.190.0050.04417.07
5.5.180.0070.04217.07
5.5.170.0000.01514.13
5.5.160.0060.04217.19
5.5.150.0100.03316.96
5.5.140.0070.03517.06
5.5.130.0040.04317.22
5.5.120.0080.04217.18
5.5.110.0060.04117.08
5.5.100.0030.04417.02
5.5.90.0050.04417.10
5.5.80.0070.03717.13
5.5.70.0070.04217.06
5.5.60.0050.04317.03
5.5.50.0030.04417.05
5.5.40.0060.04116.91
5.5.30.0050.04217.15
5.5.20.0020.03516.93
5.5.10.0030.04517.10
5.5.00.0030.04316.96
5.4.450.0050.04115.81
5.4.440.0080.03915.96
5.4.430.0070.04015.85
5.4.420.0080.03615.81
5.4.410.0060.03515.74
5.4.400.0020.03415.70
5.4.390.0030.04215.72
5.4.380.0050.04215.80
5.4.370.0070.03115.72
5.4.360.0030.03315.70
5.4.350.0030.04115.70
5.4.340.0020.03315.72
5.4.330.0070.00412.38
5.4.320.0030.04515.70
5.4.310.0050.04015.64
5.4.300.0050.04015.69
5.4.290.0030.03815.65
5.4.280.0050.03515.79
5.4.270.0030.02415.72
5.4.260.0050.03515.64
5.4.250.0080.04015.72
5.4.240.0030.04515.77
5.4.230.0030.04315.64
5.4.220.0050.04115.72
5.4.210.0080.03515.71
5.4.200.0060.04115.65
5.4.190.0040.04315.71
5.4.180.0020.04515.72
5.4.170.0030.04015.61
5.4.160.0030.04015.71
5.4.150.0070.03715.69
5.4.140.0050.03714.37
5.4.130.0030.04014.42
5.4.120.0060.03414.42
5.4.110.0080.03314.38
5.4.100.0020.02914.42
5.4.90.0040.03814.40
5.4.80.0020.04014.32
5.4.70.0030.04014.38
5.4.60.0050.03414.35
5.4.50.0060.04014.43
5.4.40.0030.03814.46
5.4.30.0090.02914.34
5.4.20.0050.03514.36
5.4.10.0000.04214.38
5.4.00.0030.03714.13
5.3.290.0050.03313.46
5.3.280.0030.04513.54
5.3.270.0050.03913.55
5.3.260.0020.04613.53
5.3.250.0080.03013.54
5.3.240.0020.04413.53
5.3.230.0030.03613.53
5.3.220.0060.03513.48
5.3.210.0070.03813.47
5.3.200.0100.03713.42
5.3.190.0050.03513.54
5.3.180.0030.04213.51
5.3.170.0040.03713.53
5.3.160.0020.03013.52
5.3.150.0050.03813.49
5.3.140.0040.03613.51
5.3.130.0020.03913.50
5.3.120.0030.03613.50
5.3.110.0030.04013.52
5.3.100.0000.04113.26
5.3.90.0000.04413.24
5.3.80.0050.04013.24
5.3.70.0020.04113.16
5.3.60.0050.03713.13
5.3.50.0040.03413.20
5.3.40.0050.04013.17
5.3.30.0000.02813.21
5.3.20.0020.04213.08
5.3.10.0030.04012.96
5.3.00.0010.04412.96
5.2.170.0000.06011.04
5.2.160.0070.05311.23
5.2.150.0000.06011.25
5.2.140.0030.05711.19
5.2.130.0030.06010.98
5.2.120.0000.05010.99
5.2.110.0000.06011.24
5.2.100.0000.06311.18
5.2.90.0000.04010.98
5.2.80.0000.03311.19
5.2.70.0000.06011.20
5.2.60.0030.05711.11
5.2.50.0030.06011.11
5.2.40.0030.06311.09
5.2.30.0070.06311.01
5.2.20.0030.06011.11
5.2.10.0000.05710.93
5.2.00.0030.06010.79
5.1.60.0000.05310.43
5.1.50.0100.05010.43
5.1.40.0070.04710.43
5.1.30.0030.05310.43
5.1.20.0000.04710.43
5.1.10.0070.05010.43
5.1.00.0000.05710.43
5.0.50.0000.04710.43
5.0.40.0100.03710.43
5.0.30.0030.07010.43
5.0.20.0030.04010.43
5.0.10.0030.03310.43
5.0.00.0030.05710.43
4.4.90.0030.03010.98
4.4.80.0000.03710.43
4.4.70.0000.04010.43
4.4.60.0000.03710.43
4.4.50.0000.02310.43
4.4.40.0000.05310.43
4.4.30.0070.03010.43
4.4.20.0070.03310.43
4.4.10.0030.03310.43
4.4.00.0030.05010.43
4.3.110.0030.03710.43
4.3.100.0030.02310.43
4.3.90.0030.03310.43
4.3.80.0100.05010.43
4.3.70.0000.03310.43
4.3.60.0030.03010.43
4.3.50.0000.03710.43
4.3.40.0000.05310.43
4.3.30.0030.03010.43
4.3.20.0030.03010.43
4.3.10.0000.03310.43
4.3.00.0000.03710.43

preferences:
48.64 ms | 401 KiB | 5 Q