JVM vs V8: How Java and JavaScript Execution Works

📰 Dev.to · João Godinho

Learn how Java and JavaScript execution differ in JVM and V8 engines and why it matters for performance and development

intermediate Published 12 Apr 2026

Action Steps

Compare the compilation processes of JVM and V8 engines
Run a Java program using JVM to see how static compilation works
Run a JavaScript program using V8 to see how dynamic compilation works
Configure a Java project to use Just-In-Time (JIT) compilation
Test the performance of a JavaScript program using V8's caching mechanism

Who Needs to Know This

Software engineers and developers working with Java and JavaScript will benefit from understanding the differences between JVM and V8 engines to optimize their code and improve performance

Key Insight

💡 JVM uses static compilation while V8 uses dynamic compilation, affecting performance and development