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This new compiler would be the source of the name “HotSpot”, which derives from the fact that, as it runs Java bytecode, it continually analyzes the program’s performance for “hot spots” which are frequently or repeatedly executed. These are then targeted for optimization, leading to high performance execution with a minimum of overhead for less performance-critical code. In some cases, it is possible for adaptive optimization of a JVM to exceed the performance of hand-coded C++ or C code.[4]

Initially available as an add-on for Java 1.2,[5] HotSpot became the default Sun JVM in Java 1.3.[6]

via HotSpot – Wikipedia, the free encyclopedia.

 

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