why interfaces are faster than abstract classes?

Question Posted / raaga

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why interfaces are faster than abstract classes?..

Answer / aruna raman

Actually abstract are faster than interfaces classes.

interfaces are Slow, requires extra indirection to find the
corresponding method in the actual class. Modern JVM's are
discovering ways to reduce this speed penalty.

Abstract Class ::
- It cannot defines all the methods
- It has subclass.
- Here, Subclass is useless
- A class can be extend an abstract class

Interface ::
- It defines all the methods
- It must have implementations by other classes, But there
will be no use of that.
- Only an interface can extend another interface.

Is This Answer Correct ?

16 Yes

3 No

why interfaces are faster than abstract classes?..

Answer / laxmikant

As Interfaces always have abstract methods, it needs less
time for compiler to compile them as compared to abstract
classes which may have well defined methods for sharing
among the classes which will extend it.

Is This Answer Correct ?

4 Yes

16 No

why interfaces are faster than abstract classes?..

Answer / kalyan g

one more thing about interface is, we dont have any
implementations,so no burden of this, hence it is good in
performance

Is This Answer Correct ?

5 Yes

21 No

why interfaces are faster than abstract classes?..

Answer / m gangadhar

using interfaces over abstract classes is gives better
ferformance becoz interfaces does not have any constructor
but abstract classes can have. for this reason it does not
vaste time to create object.

Is This Answer Correct ?

11 Yes

29 No

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