refine distance of rectangle

[AvenSun]

we can get much more performance improvement.

BenchmarkDotNet v0.13.10, Windows 10 (10.0.19044.3693/21H2/November2021Update)
  .NET SDK 8.0.100
  [Host]     : .NET 7.0.14 (7.0.1423.51910), X64 RyuJIT AVX2
  Job-KHKRLK : .NET 7.0.14 (7.0.1423.51910), X64 RyuJIT AVX2
  Job-EYLDJJ : .NET 8.0.0 (8.0.23.53103), X64 RyuJIT AVX2

IterationCount=10  LaunchCount=1  WarmupCount=1  

Method	Runtime	Mean	Error	StdDev	Ratio	Allocated	Alloc Ratio
DistanceBySdcb	.NET 7.0	534.3 ns	13.60 ns	9.00 ns	1.00	-	NA
DistanceByAven	.NET 7.0	403.2 ns	2.48 ns	1.64 ns	0.75	-	NA
DistanceBySdcb	.NET 8.0	554.4 ns	5.64 ns	3.73 ns	1.00	-	NA
DistanceByAven	.NET 8.0	162.7 ns	2.40 ns	1.43 ns	0.29	-	NA

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using OpenCvSharp;
using OpenCvSharp.Text;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sdcb.OpenVINO.Benchmarks
{
    [SimpleJob(runtimeMoniker: RuntimeMoniker.Net70, launchCount: 1, warmupCount: 1, iterationCount: 10)]
    [SimpleJob(runtimeMoniker: RuntimeMoniker.Net80, launchCount: 1, warmupCount: 1, iterationCount: 10)]
    [MemoryDiagnoser]
    [HtmlExporter]
    [MarkdownExporterAttribute.GitHub]
    public class BoxDistance
    {
        private Random random;
        private List<Rect> rects;

        [GlobalSetup]
        public void GlobalSetup()
        {
           this.random = new();
            int rectNum = 100;
           this.rects = new(rectNum);
            for (int i = 0; i < rectNum; i++)
            {
                this.rects.Add(new Rect(
                    this.random.Next(0, 640), this.random.Next(0, 640),
                    this.random.Next(0, 640), this.random.Next(0, 640)));
            }
        }

        [Benchmark(Description = "DistanceBySdcb", Baseline = true)]
        public void DistanceBySdcb() 
        { 
            for (int i = 0;i < this.rects.Count; i += 2)
            {
                DistanceSdcb(this.rects[i], this.rects[i + 1]);
            }
        }

        [Benchmark(Description = "DistanceByAven")]
        public void DistanceByAven()
        {
            for (int i = 0; i < this.rects.Count; i += 2)
            {
                DistanceAven(this.rects[i], this.rects[i + 1]);
            }
        }

        static float DistanceSdcb(in Rect box1, in Rect box2)
        {
            int x1_1 = box1.X;
            int y1_1 = box1.Y;
            int x2_1 = box1.Right;
            int y2_1 = box1.Bottom;

            int x1_2 = box2.X;
            int y1_2 = box2.Y;
            int x2_2 = box2.Right;
            int y2_2 = box2.Bottom;

            float dis = Math.Abs(x1_2 - x1_1) + Math.Abs(y1_2 - y1_1) + Math.Abs(x2_2 - x2_1) + Math.Abs(y2_2 - y2_1);
            float dis_2 = Math.Abs(x1_2 - x1_1) + Math.Abs(y1_2 - y1_1);
            float dis_3 = Math.Abs(x2_2 - x2_1) + Math.Abs(y2_2 - y2_1);
            return dis + Math.Min(dis_2, dis_3);
        }

        static float DistanceAven(in Rect box1, in Rect box2)
        {
            int dx1 = Math.Abs(box2.X - box1.X);
            int dy1 = Math.Abs(box2.Y - box1.Y);
            int dx2 = Math.Abs(box2.Right - box1.Right);
            int dy2 = Math.Abs(box2.Bottom - box1.Bottom);

            float dis = dx1 + dy1 + dx2 + dy2;
            float dis_2 = dx1 + dy1;
            float dis_3 = dx2 + dy2;

            return dis + Math.Min(dis_2, dis_3);
        }

    }
}

[sdcb]

thanks so much!