The Computer Language
Benchmarks Game

binary-trees C# .NET Core program

source code

/*
      The Computer Language Benchmarks Game
      http://benchmarksgame.alioth.debian.org/ 

      contributed by Marek Safar  
      optimized by kasthack
      *reset*
*/
using System;

class BinaryTrees {
   const int minDepth = 4;
   public static void Main( String[] args ) {
      int n = 0;
      if ( args.Length > 0 ) n = Int32.Parse(args[0]);
      int maxDepth = Math.Max(minDepth + 2, n);
      int stretchDepth = maxDepth + 1;
      int check = ( TreeNode.bottomUpTree(stretchDepth) ).itemCheck();
      Console.WriteLine("stretch tree of depth {0}\t check: {1}", stretchDepth, check);
      TreeNode longLivedTree = TreeNode.bottomUpTree(maxDepth);
      for ( int depth = minDepth; depth <= maxDepth; depth += 2 ) {
         int iterations = 1 << ( maxDepth - depth + minDepth );
         check = 0;
         for ( int i = 1; i <= iterations; i++ ) {
            check += ( TreeNode.bottomUpTree(depth) ).itemCheck();
         }
         Console.WriteLine("{0}\t trees of depth {1}\t check: {2}",
             iterations, depth, check);
      }
      Console.WriteLine("long lived tree of depth {0}\t check: {1}",
          maxDepth, longLivedTree.itemCheck());
   }

   class TreeNode {
      private TreeNode left, right;

      internal static TreeNode bottomUpTree( int depth ) {
         TreeNode t;
         ChildTreeNodes(out t, depth);
         return t;
      }
      static void ChildTreeNodes( out TreeNode node, int depth ) {
         node = new TreeNode();
         if ( depth > 0 ) {
            ChildTreeNodes(out node.left, depth - 1);
            ChildTreeNodes(out node.right, depth - 1);
         }
      }
      internal int itemCheck() {
         if ( right == null ) return 1;
         else return 1 + left.itemCheck() + right.itemCheck();
      }
   }
}
    

notes, command-line, and program output

NOTES:
64-bit Ubuntu quad core
2.0.0 cdcd1928c9
"System.GC.Server": true


Mon, 14 Aug 2017 18:51:58 GMT

MAKE:
cp binarytrees.csharpcore Program.cs
cp Include/csharpcore/tmp.csproj .
cp Include/csharpcore/runtimeconfig.template.json .
mkdir obj
cp Include/csharpcore/tmp.csproj.nuget.g.props ./obj
cp Include/csharpcore/tmp.csproj.nuget.g.targets ./obj
/usr/bin/dotnet build -c Release
Microsoft (R) Build Engine version 15.3.409.57025 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  tmp -> /home/dunham/benchmarksgame_quadcore/binarytrees/tmp/bin/Release/netcoreapp2.0/tmp.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:05.54

13.16s to complete and log all make actions

COMMAND LINE:
/usr/bin/dotnet ./bin/Release/netcoreapp2.0/tmp.dll 21

PROGRAM OUTPUT:
stretch tree of depth 22	 check: 8388607
2097152	 trees of depth 4	 check: 65011712
524288	 trees of depth 6	 check: 66584576
131072	 trees of depth 8	 check: 66977792
32768	 trees of depth 10	 check: 67076096
8192	 trees of depth 12	 check: 67100672
2048	 trees of depth 14	 check: 67106816
512	 trees of depth 16	 check: 67108352
128	 trees of depth 18	 check: 67108736
32	 trees of depth 20	 check: 67108832
long lived tree of depth 21	 check: 4194303