public void PerformanceReportWithNoArguments()
{
int count = 1000000;
Trace.WriteLine($"#{count} 次调用:");
double time = StopwatchHelper.Calculate(count, () => {
ClassB b = new ClassB();
}).TotalMilliseconds;
Trace.WriteLine($"‘New’耗时 {time} milliseconds");
double time2 = StopwatchHelper.Calculate(count, () => {
ClassB b = CreateObjectFactory.CreateInstance2 <ClassB>();
}).TotalMilliseconds;
Trace.WriteLine($"‘Emit 工厂’耗时 {time2} milliseconds");
double time3 = StopwatchHelper.Calculate(count, () => {
ClassB b = ExpressionCreateObject.CreateInstance <ClassB>();
}).TotalMilliseconds;
Trace.WriteLine($"‘Expression’耗时 {time3} milliseconds");
double time4 = StopwatchHelper.Calculate(count, () => {
ClassB b = ExpressionCreateObjectFactory.CreateInstance <ClassB>();
}).TotalMilliseconds;
Trace.WriteLine($"‘Expression 工厂’耗时 {time4} milliseconds");
double time5 = StopwatchHelper.Calculate(count, () => {
ClassB b = Activator.CreateInstance <ClassB>();
//ClassB b = Activator.CreateInstance(typeof(ClassB)) as ClassB;
}).TotalMilliseconds;
Trace.WriteLine($"‘Activator.CreateInstance’耗时 {time5} milliseconds");
/**
*
#1000000 次调用:
*
* ‘New’耗时 21.7474 milliseconds
*
* ‘Emit 工厂’耗时 174.088 milliseconds
*
* ‘Expression’耗时 42.9405 milliseconds
*
* ‘Expression 工厂’耗时 162.548 milliseconds
*
* ‘Activator.CreateInstance’耗时 67.3712 milliseconds
*
* */
}
public ClassA(ClassB classB)
{
}
public void NoArguments()
{
ClassB b = CreateObjectFactory.CreateInstance <ClassB>();
Assert.AreEqual(default(int), b.GetInt());
}