Is a switch statement the fastest way to implement operator interpretation in Java
- by Mordan
Is a switch statement the fastest way to implement operator interpretation in Java
public boolean accept(final int op, int x, int val) {
switch (op) {
case OP_EQUAL:
return x == val;
case OP_BIGGER:
return x > val;
case OP_SMALLER:
return x < val;
default:
return true;
}
}
In this simple example, obviously yes. Now imagine you have 1000 operators. would it still be faster than a class hierarchy? Is there a threshold when a class hierarchy becomes more efficient in speed than a switch statement? (in memory obviously not)
abstract class Op {
abstract public boolean accept(int x, int val);
}
And then one class per operator.
