JCU, designed for performance

Java Classfile Util, which provides low-level primitives for interacting with class bytecodes and unsafe but fast APIs

Note

Apart from jcu-core, all other APIs are still in the early development stage.

JCU, is it the brother of ICU?

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Project features:

• Advanced Bytecode Manipulation:

  • Low-level primitives for classfile parsing and generation
  • Direct access to constant pool and method bytecode

• JDK-specific Optimizations:

  • Extremely radical strategies tailored for specific JDK internals (must be manually enabled, see below for details)
  • Version-specific optimizations that leverage newer APIs

• Ultimate performance:

  • jcu-core is designed from the ground up for maximum performance

  • Fast Class: We provide some extremely radical strategies specifically for JDK internal of the particular version, to enable those, you should add some arguments to your JVM:

    --add-exports=java.base/jdk.internal.misc=dev.oblivruin.jcu.core
    --add-opens=java.base/java.lang=dev.oblivruin.jcu.core
    

    And initialize the optimizations before using other APIs: dev.oblivruin.jcu.misc.Internal.loadFastC()

    Java	Support
    JDK 1.8	×
    JDK 9	√
    JDK 10	√
    JDK 11	√
    JDK 12	√
    JDK 13	√
    JDK 14	√
    JDK 15	√
    JDK 16	√
    JDK 17	√
    JDK 18	√
    JDK 19	√
    JDK 20	√
    JDK 21	√
    JDK 22	√
    JDK 23	√
    JDK 24	√
    JDK 25	√