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C# Performance Tricks: How To Radically Speed Up Your Code

Finished an online program @ Udemy.

スクリーンショット 2017-02-01 7.58.15
C# Performance Tricks: How To Radically Speed Up Your Code

private static ClassCreator GetClassCreator (string typeName)
{
	// get delegate from dictionary
	if (ClassCreators.ContainsKey (typeName))
		return ClassCreators [typeName];
		
	// get the default constructor of the type
	Type t = Type.GetType (typeName);
	ConstructorInfo ctor = t.GetConstructor (new Type[0]);
	
	// create a new dynamic method that constructs and returns the type
	string methodName = t.Name + "Ctor";
	DynamicMethod dm = new DynamicMethod (methodName, t, new Type[0], typeof(object).Module);	
	ILGenerator lgen = dm.GetILGenerator ();
	lgen.Emit (OpCodes.Newobj, ctor);
	lgen.Emit (OpCodes.Ret);
	
	// add delegate to dictionary and return
	ClassCreator creator = (ClassCreator)dm.CreateDelegate (typeof(ClassCreator));
	ClassCreators.Add (typeName, creator);
	return creator;
}

private static ClassCreator GetClassCreator (string typeName)

{

// get delegate from dictionary

if (ClassCreators.ContainsKey (typeName))

return ClassCreators [typeName];

// get the default constructor of the type

Type t = Type.GetType (typeName);

ConstructorInfo ctor = t.GetConstructor (new Type[0]);

// create a new dynamic method that constructs and returns the type

string methodName = t.Name + "Ctor";

DynamicMethod dm = new DynamicMethod (methodName, t, new Type[0], typeof(object).Module);

ILGenerator lgen = dm.GetILGenerator ();

lgen.Emit (OpCodes.Newobj, ctor);

lgen.Emit (OpCodes.Ret);

// add delegate to dictionary and return

ClassCreator creator = (ClassCreator)dm.CreateDelegate (typeof(ClassCreator));

ClassCreators.Add (typeName, creator);

return creator;

}