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The project tries to extend the basic Hotswap support in the current JVM and allows developers to add/remove instance fields and methods and replace the new class in a running JVM, thus saving huge time incurred in restarting the JVM for every change.
HUP is a heap-profiling tool that allows the exploration and reduction of heap space consumption in Java applications. The HUP tool allows a programmer to locate and remove memory bottlenecks, which are caused by unused objects.