NetBenchmarkDotNet性能测试

案例

using BenchmarkDotNet.Attributes;
using BenchmarkDotNetDemo.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace BenchmarkDotNetDemo
{
    [MemoryDiagnoser, RankColumn]
    public class Test
    {


        IList<HTEAndStudent> stringslist = new List<HTEAndStudent>();
     /*   List<HTEAndStudent> stringslist2 = new List<HTEAndStudent>();

        List<HTEAndStudentDto> hTEAndStudentDtosOut = new();*/
        public Test()
        {
            Random random = new Random();
            for (int i = 0; i < 10000000; i++)
            {
                stringslist.Add(new HTEAndStudent
                {
                    IsSubmit = true,
                    StudentId = i,
                    Score = i + random.Next(1, 99),
                    Scorerate = 666,
                    StudyClassId = i + random.Next(1, 11),
                });

              /*  stringslist2.Add(new HTEAndStudent
                {
                    IsSubmit = true,
                    StudentId = i.ToString(),
                    Score = i + random.Next(1, 99),
                    Scorerate = 666,
                    StudyClassId = i + random.Next(1, 11),
                });*/
            }

           /* for (int i = 0; i < 1000; i++)
            {
                hTEAndStudentDtosOut.Add(new()
                {
                    IsSubmit = true,
                    StudentId = i,
                    Score = i + random.Next(1, 99),
                    Scorerate = 666,
                    StudyClassId = i + random.Next(1, 81),
                });
            }*/
        }

        /* [Benchmark]
         public void KK()
         {
             var aaaa = stringslist2.Where(r => r.StudentId < 1800).ToList();
             foreach (var item in aaaa)
             {
                 var bbbb = hTEAndStudentDtosOut.Where(r => r.StudyClassId == item.StudyClassId && r.Score > 50).ToList();
                 var aadd = bbbb.Count;
             }
         }
         [Benchmark]
         public void KK1()
         {
             var aaaa = stringslist2.Where(r => r.StudentId < 1800).ToList();
             var bbbbdic = hTEAndStudentDtosOut.GroupBy(r=>r.StudyClassId).ToDictionary(r => r.Key,v=>v.Where(r=>r.Score > 50).ToList());
             foreach (var item in aaaa)
             {
                 if(bbbbdic.ContainsKey(item.StudyClassId))
                 {
                     var bbbb = bbbbdic[item.StudyClassId];
                     var aadd = bbbb.Count;
                 }
             }
         }*/








/*

        [Benchmark]
        public void Count_Method()
        {
            if (stringslist.Count() == 0)
            {
                Console.WriteLine("5555");
            }
        }



        [Benchmark]
        public void Count_Property()
        {
            if (stringslist.Count == 0)
            {
                Console.WriteLine("5555");
            }
        }

        [Benchmark]
        public void Any()
        {
            if (!stringslist.Any())
            {
                Console.WriteLine("5555");
            }
        }



        [Benchmark]
        public void Count_Method_Where()
        {
            if (stringslist.Count(r => r.StudentId == 5) == 0)
            {
                Console.WriteLine("5555");
            }
        }


        [Benchmark]
        public void Any_Method_Where()
        {
            if (!stringslist.Any(r => r.StudentId == 5))
            {
                Console.WriteLine("5555");
            }
        }



        [Benchmark]
        public void IListForeEachList()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            stringslist.ToList().ForEach(r =>
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            });

        }*/

        [Benchmark]
        public void ForeEachList()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            stringslist.ToList().ForEach(r =>
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            });

        }

        [Benchmark]
        public void Forech()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            foreach (var r in stringslist)
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            }
            
        }

        [Benchmark]
        public void For()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            for (int i = 0; i < stringslist.Count; i++)
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = stringslist[i].StudyClassId,
                    Scorerate = stringslist[i].Scorerate,
                    IsSubmit = stringslist[i].IsSubmit,
                    Score = stringslist[i].Score,
                    StudentId = stringslist[i].StudentId,
                });
            }
        }









       /* [Benchmark]
        public void ForechIntoDto()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            foreach (var r in stringslist)
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            }
        }

        [Benchmark]
        public void LinqSelectIntoDto()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = stringslist.Select(r => new HTEAndStudentDto()
            {
                StudyClassId = r.StudyClassId,
                Scorerate = r.Scorerate,
                IsSubmit = r.IsSubmit,
                Score = r.Score,
                StudentId = r.StudentId,
            }
            ).ToList();
        }


        [Benchmark]
        public void foreachHasWhereOuter()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            var data = stringslist.Where(r => r.Score > 80);
            foreach (var r in data)
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            }
        }

        [Benchmark]
        public void foreachHasWhereInner()
        {
            List<HTEAndStudentDto> hTEAndStudentDtos = new();
            foreach (var r in stringslist.Where(r => r.Score > 80))
            {
                hTEAndStudentDtos.Add(new()
                {
                    StudyClassId = r.StudyClassId,
                    Scorerate = r.Scorerate,
                    IsSubmit = r.IsSubmit,
                    Score = r.Score,
                    StudentId = r.StudentId,
                });
            }
        }*/
    }
}

Program

using BenchmarkDotNet.Running;

namespace BenchmarkDotNetDemo
{
    internal class Program
    {
        static void Main(string[] args)
        {

            var summary = BenchmarkRunner.Run<Test>();
            Console.WriteLine("Hello, World!");
        }
    }
}