binary-trees C# .NET #7 program

// The Computer Language Benchmarks Game
// https://benchmarksgame-team.pages.debian.net/benchmarksgame/
//
// based Tristan Dupont Java #7 and Anthony Lloyd C# 
// contributed by Isaac Gouy

using System;
using System.Threading.Tasks;

class BinaryTrees
{
    const int MinDepth = 4;
    const int NoTasks = 4;

    public static void Main(string[] args)
    {
        int maxDepth = args.Length == 0 ? 10
            : Math.Max(MinDepth + 2, int.Parse(args[0]));

        Console.WriteLine(string.Concat("stretch tree of depth ", maxDepth + 1,
            "\t check: ", (bottomUpTree(maxDepth + 1)).itemCheck()));

        var longLivedTree = bottomUpTree(maxDepth);

        var results = new string[(maxDepth - MinDepth) / 2 + 1];

        for (int i = 0; i < results.Length; i++)
        {
            int depth = i * 2 + MinDepth;
            int n = (1 << maxDepth - depth + MinDepth) / NoTasks;
            var tasks = new Task<int>[NoTasks];
            for (int t = 0; t < tasks.Length; t++)
            {
                tasks[t] = Task.Run(() =>
                {
                    var check = 0;
                    for (int i = n; i > 0; i--)
                        check += (bottomUpTree(depth)).itemCheck();
                    return check;
                });
            }
            var check = tasks[0].Result;
            for (int t = 1; t < tasks.Length; t++)
                check += tasks[t].Result;
            results[i] = string.Concat(n * NoTasks, "\t trees of depth ",
                depth, "\t check: ", check);
        }
        for (int i = 0; i < results.Length; i++)
            Console.WriteLine(results[i]);

        Console.WriteLine(string.Concat("long lived tree of depth ", maxDepth,
            "\t check: ", longLivedTree.itemCheck()));
    }
    
    static TreeNode bottomUpTree(int depth) 
    {
        if (0 < depth) {
            return new TreeNode(bottomUpTree(depth - 1), bottomUpTree(depth - 1));
        }
        return new TreeNode(null,null);
    }

    private class TreeNode
    {
        readonly TreeNode left, right;
        
        internal TreeNode(TreeNode left, TreeNode right) 
        {
            this.left = left;
            this.right = right;
        }     

        internal int itemCheck()
        {
            if (null == left) {
                return 1;
            }
            return 1 + left.itemCheck() + right.itemCheck();
        }
    }   
}
    

NOTES:
64-bit Ubuntu quad core
.NET SDK 9.0.100
Host Version: 9.0.0
Commit: 9d5a6a9aa4

<OutputType>Exe
<TargetFramework>net9.0
<ImplicitUsings>enable
<Nullable>enable
<AllowUnsafeBlocks>true
<ServerGarbageCollection>true
<ConcurrentGarbageCollection>true
<PublishAot>false



 Wed, 13 Nov 2024 22:04:31 GMT

MAKE:
cp binarytrees.csharpcore-7.csharpcore Program.cs
cp Include/csharpcore/program.csproj .
mkdir obj
cp Include/csharpcore/project.assets.json ./obj
/opt/src/dotnet-sdk-9.0.100/dotnet build -c Release --use-current-runtime  	
  Determining projects to restore...
  Restored /home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/program.csproj (in 728 ms).
/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/Program.cs(60,29): warning CS8625: Cannot convert null literal to non-nullable reference type. [/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/program.csproj]
/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/Program.cs(60,34): warning CS8625: Cannot convert null literal to non-nullable reference type. [/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/program.csproj]
  program -> /home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/bin/Release/net9.0/linux-x64/program.dll

Build succeeded.

/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/Program.cs(60,29): warning CS8625: Cannot convert null literal to non-nullable reference type. [/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/program.csproj]
/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/Program.cs(60,34): warning CS8625: Cannot convert null literal to non-nullable reference type. [/home/dunham/all-benchmarksgame/benchmarksgame_i53330/binarytrees/tmp/program.csproj]
    2 Warning(s)
    0 Error(s)

Time Elapsed 00:00:09.96

11.82s to complete and log all make actions

COMMAND LINE:
 ./bin/Release/net9.0/linux-x64/program 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