What is the difference between Invoke and DynamicInvoke in delegates? Please give me some code example which explain difference between that two methods.
Difference Between Invoke and DynamicInvoke
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When you have a delegate instance, you might know the exact type, or you might just know that it is a
Delegate
. If you know the exact type, you can useInvoke
, which is very fast - everything is already pre-validated. For example:However! If you just know that it is
Delegate
, it has to resolve the parameters etc manually - this might involve unboxing, etc - a lot of reflection is going on. For example:Note I've written the
args
long hand to make it clear that anobject[]
is involved. There are lots of extra costs here:MethodInfo
Basically, avoid
DynamicInvoke
when-ever you can.Invoke
is always preferable, unless all you have is aDelegate
and anobject[]
.For a performance comparison, the following in release mode outside of the debugger (a console exe) prints:
Code: