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Java™
by example!
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What is the cost of invoking a method through reflection as opposed to invoking it normally?
First of all, if that method takes a long time to execute, the overhead of invoking it is insignificant.
This example program shows some performance differences in milliseconds.
- normal: execute a method normally
- same: execute a method through reflection, but use the same method instance
- diff: execute a method through reflection, but do a method lookup inside the loop
It turns out that looking up the method is rather expensive but invocation is fairly cheap.
Main.java:
outputs:
Further Information
Author of answer: Joris Van den Bogaert
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