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HotSpot, released as the "Java HotSpot Performance Engine" is a Java virtual machine for desktops and servers, maintained and distributed by Oracle Corporation. It features techniques such as just-in-time compilation and adaptive optimization designed to improve performance. ==History== The Java HotSpot Performance Engine, first released April 27, 1999, built on technologies from the Strongtalk implementation of the Smalltalk programming language originally developed by Longview Technologies, which traded as "Animorphic". Animorphic's virtual-machine technology had earlier been successfully used in a Sun research project, the Self programming language. In 1997 Sun Microsystems purchased Animorphic. Shortly after acquiring Animorphic, Sun intended to write a new just-in-time (JIT) compiler for the newly developed virtual machine. This new compiler would give rise to the name "HotSpot", which derives from the fact that, as the software 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 one report, the JVM beat some C++ or C code in some benchmarks. Initially available as an add-on for Java 1.2, HotSpot became the default Sun JVM in Java 1.3.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HotSpot」の詳細全文を読む スポンサード リンク
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