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I read that in the Java (version 1.4.x) reflection implementation has been optim

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Question: I read that in the Java (version 1.4.x) reflection implementation has been optimized for speed and it is significantly faster now...?

Answer: The APIs and semantics are the same as in previous J2SE versions. There are three key optimizations in the new implementation:

Caching of results of Class.getFields(), Class.getMethods(), and related routines
Dynamic generation of bytecodes for Method.invoke() and Constructor.newInstance()
Optimized security checks for reflective calls

Due to these optimizations, reflective method calls are between 20 and 25 times faster, and reflective object creation is between 5 and 6 times faster. Reflection intensive code, such as serialization, has benefited from this additional speed.

The tip is based on Sun’s "Version 1.4 Core Libraries" description
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