Java Cold Method Refactoring

We discuss the techniques and benefits of migrating the bodies of loaded, but unused (cold), Java methods to secondary classes which need not be loaded, thus reducing the amount of resources required for Java class loading, storage and verification. The migration is done using binary refactoring of compiled Java classes. We tested two popular applications and showed that under certain conditions we can attain 8% benefit to start up time and almost 7% reduced memory consumption. Benefits were also demonstrated for page faults and working set. We further identify the attributes of class libraries and applications which can affect the benefits of our cold method refactoring.

By: David A. Wood; Bill Tracey

Published in: RC24827 in 2009


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