Java Addon V8 Repack

Loading .so from inside a JAR requires copying to a temporary directory. Repacks often include a NativeExtractor that checks:

After compilation, the following are repackaged:

A fat JAR approach places native libraries in META-INF/lib/<platform>/ and extracts them at runtime using NativeUtils.loadLibraryFromJar(). java addon v8 repack

In the context of Java applications, "V8" usually refers to one of two things:

A well-executed repack can yield near-native JS execution speed, but overhead remains in crossing the JNI boundary for each function call or object access. Optimization strategies include:

Benchmark comparison (operations/second, higher is better): Loading

| Operation | J2V8 (repacked monolithic) | Nashorn (legacy) | GraalJS (native image) | |-----------|----------------------------|------------------|------------------------| | Fibonacci (iterative) | 8.2M | 3.1M | 9.5M | | JSON parse/stringify | 1.1M | 0.4M | 1.3M | | C++ getter call | 2.3M | 0.9M | 2.8M |