Java Addon V8 Repack (2024)

: Clone a starter repo, load a real-world .js bundle, and measure your latency. The performance delta will speak for itself. Have questions or experiences with Java+V8 repacks? Share your benchmarks and crash reports in the community forums. The repack ecosystem thrives on real-world feedback.

dependencies implementation 'io.github.java-addon:v8-repack:2025.01.22' java addon v8 repack

One major advantage of a well-repacked addon is reduced JNI overhead: : Clone a starter repo, load a real-world

import com.eclipsesource.v8.V8; import com.eclipsesource.v8.V8Array; import com.eclipsesource.v8.V8Object; public class V8RepackDemo public static void main(String[] args) try (V8 runtime = V8.createV8Runtime("secure_isolate")) // Execute simple JS int result = runtime.executeIntegerScript("(function() return 5 * 8; )();"); System.out.println("5*8 = " + result); Share your benchmarks and crash reports in the

// Call JS function from Java runtime.executeVoidScript("function multiply(a, b) return a * b; "); Object multiplyResult = runtime.executeJSFunction("multiply", 12, 7); System.out.println("12*7 = " + multiplyResult);

Introduction In the ever-evolving landscape of software development, the need to bridge different runtime environments has become critical. One of the most powerful yet under-documented intersections is the combination of Java (the JVM-based enterprise workhorse) and Google’s V8 JavaScript engine (the high-performance runtime that powers Chrome and Node.js).

Example of a repack in action (Maven snippet):