Tokenisation and Compression of Java Class Files

Shawn Haggett, Gregory Knowles

    Research output: Contribution to journalArticle

    Abstract

    Method calls in object oriented languages, such as Java, are bound at run-time, making the method binding technique very important for the performance of the language. Efficient implementations can rely on having additional memory and/or processing power available either to store lookup tables or to allow for the construction of caches or rewriting of instructions during runtime. These are luxuries not always available on mobile devices such as mobile phones, tablets, etc. In this paper we describe a novel way of tokenising and compressing method dispatch tables to provide an efficient dispatch process which could be implemented in hardware in only a few operations. We demonstrate this in the context of Java, also showing a significant reduction in size for the resulting class files.

    Original languageEnglish
    Pages (from-to)1-12
    Number of pages12
    JournalJournal of Systems Architecture
    Volume58
    Issue number1
    DOIs
    Publication statusPublished - Jan 2012

    Keywords

    • CLDC
    • Embedded systems
    • J2ME
    • Java virtual machine

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