Created
February 16, 2016 02:54
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Method call performance
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| using System; | |
| using System.Diagnostics; | |
| using System.Reflection; | |
| namespace CallPerf | |
| { | |
| internal interface ICounter | |
| { | |
| long Count { get; } | |
| void Increase(); | |
| } | |
| internal delegate void Increase(); | |
| internal class Counter : ICounter | |
| { | |
| private long _count; | |
| public long Count => _count; | |
| public void Increase() => _count++; | |
| } | |
| public class Program | |
| { | |
| public static void Main() | |
| { | |
| int n = 1000 * 1000 * 1000; | |
| Direct(n); | |
| Console.WriteLine(); | |
| Delegate(n); | |
| //Console.WriteLine(); | |
| //Reflection(n); | |
| Console.WriteLine(); | |
| CreateDelegate(n); | |
| } | |
| private static void Direct(int n) | |
| { | |
| using (Job.StartNew("Direct")) | |
| { | |
| Counter counter = new Counter(); | |
| for (int i = 0; i < n; i++) | |
| counter.Increase(); | |
| Console.WriteLine("Count: {0}", counter.Count); | |
| } | |
| } | |
| private static void Delegate(int n) | |
| { | |
| using (Job.StartNew("Delegate")) | |
| { | |
| Counter counter = new Counter(); | |
| Increase increase = counter.Increase; | |
| for (int i = 0; i < n; i++) | |
| increase(); | |
| Console.WriteLine("Count: {0}", counter.Count); | |
| } | |
| } | |
| private static void Reflection(int n) | |
| { | |
| using (Job.StartNew("Reflection")) | |
| { | |
| Counter counter = new Counter(); | |
| MethodInfo m = typeof(Counter).GetMethod("Increase", BindingFlags.Public | BindingFlags.Instance); | |
| for (int i = 0; i < n; i++) | |
| m.Invoke(counter, null); | |
| Console.WriteLine("Count: {0}", counter.Count); | |
| } | |
| } | |
| private static void CreateDelegate(int n) | |
| { | |
| using (Job.StartNew("CreateDelegate")) | |
| { | |
| Counter counter = new Counter(); | |
| MethodInfo m = typeof(Counter).GetMethod("Increase", BindingFlags.Public | BindingFlags.Instance); | |
| Increase increase = (Increase)System.Delegate.CreateDelegate(typeof(Increase), counter, m); | |
| for (int i = 0; i < n; i++) | |
| increase(); | |
| Console.WriteLine("Count: {0}", counter.Count); | |
| } | |
| } | |
| } | |
| internal class Job : IDisposable | |
| { | |
| public static Job StartNew(string name) | |
| { | |
| return new Job(name); | |
| } | |
| private string _name; | |
| private Stopwatch _stopwatch; | |
| private Job(string name) | |
| { | |
| this._name = name; | |
| this._stopwatch = Stopwatch.StartNew(); | |
| Console.WriteLine("[{0} started]", this._name); | |
| } | |
| public void Dispose() | |
| { | |
| this._stopwatch.Stop(); | |
| Console.WriteLine("[{0} finished] {1}ms elapsed", this._name, this._stopwatch.ElapsedMilliseconds); | |
| } | |
| } | |
| } |
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