public void MeasureDictionary()
{
var an = new AssemblyName("temp");
AssemblyBuilder assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(an, AssemblyBuilderAccess.Run);
ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("MainModule");
var dict1 = new Dictionary <string, Action>();
var dict2 = new Dictionary <Guid, Action>();
var dict3 = new Dictionary <Type, Action>();
int iterations = 100000 / 4;
var keys1 = new string[iterations];
var keys2 = new Guid[iterations];
var keys3 = new Type[iterations];
//var duplicateKeys = keys3.GroupBy(x => x)
// .Where(group => group.Count() > 1)
// .Select(group => group.Key);
//Console.WriteLine(duplicateKeys.Count());
for (var i = 0; i < iterations; ++i)
{
keys1[i] = i.ToString();
keys2[i] = Guid.NewGuid();
TypeBuilder tb = moduleBuilder.DefineType($"Class{i}",
TypeAttributes.Public |
TypeAttributes.Class |
TypeAttributes.AutoClass |
TypeAttributes.AnsiClass |
TypeAttributes.BeforeFieldInit |
TypeAttributes.AutoLayout,
null);
keys3[i] = tb.CreateType();
}
Stopwatch stopwatch;
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
_hash = keys1[i].GetHashCode();
}
Console.WriteLine($"string hash {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
_hash = keys2[i].GetHashCode();
}
Console.WriteLine($"Guid hash {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
_hash = keys3[i].GetHashCode();
}
Console.WriteLine($"Type hash {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
//return;
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
dict1.Add(keys1[i], () => { });
}
Console.WriteLine($"string key {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
dict2.Add(keys2[i], () => { });
}
Console.WriteLine($"Guid key {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
stopwatch = Stopwatch.StartNew();
for (var i = 0; i < iterations; ++i)
{
dict3.Add(keys3[i], () => { });
}
Console.WriteLine($"Type key {stopwatch.Elapsed.ToEnglishString()} {iterations} iterations");
}
