Microoptimization

dotnet/WhiteRabbit/PermutationsGenerator.cs

@@ -34,9 +34,7 @@
 
             public static Permutation Empty { get; } = new Permutation(new int[] { });
 
-            private int[] PermutationData { get; }
+            public int[] PermutationData { get; }
-
-            public int this[int index] => this.PermutationData[index];
 
             public static IEnumerable<Permutation> HamiltonianPermutationsIterator(int n)
             {

dotnet/WhiteRabbit/PhraseSet.cs

@@ -5,7 +5,7 @@
     {
         public fixed uint Buffer[8 * Constants.PhrasesPerSet];
 
-        public PhraseSet(byte[][] words, PermutationsGenerator.Permutation[] permutations, int offset, int numberOfCharacters)
+        public PhraseSet(byte[][] words, int[][] permutations, int offset, int numberOfCharacters)
         {
             fixed (uint* bufferPointer = this.Buffer)
             {

dotnet/WhiteRabbit/PrecomputedPermutationsGenerator.cs

@@ -5,17 +5,19 @@
 
     internal static class PrecomputedPermutationsGenerator
     {
-        private static PermutationsGenerator.Permutation[][] Permutations { get; } = Enumerable.Range(0, 8).Select(GeneratePermutations).ToArray();
+        private static int[][][] Permutations { get; } = Enumerable.Range(0, 8).Select(GeneratePermutations).ToArray();
 
         private static long[] PermutationsNumbers { get; } = GeneratePermutationsNumbers().Take(19).ToArray();
 
-        public static PermutationsGenerator.Permutation[] HamiltonianPermutations(int n) => Permutations[n];
+        public static int[][] HamiltonianPermutations(int n) => Permutations[n];
 
         public static long GetPermutationsNumber(int n) => PermutationsNumbers[n];
 
-        private static PermutationsGenerator.Permutation[] GeneratePermutations(int n)
+        private static int[][] GeneratePermutations(int n)
         {
-            var result = PermutationsGenerator.HamiltonianPermutations(n).ToArray();
+            var result = PermutationsGenerator.HamiltonianPermutations(n)
+                .Select(permutation => permutation.PermutationData)
+                .ToArray();
             if (result.Length % Constants.PhrasesPerSet == 0)
             {
                 return result;