Node.js 14 is over 2x faster than OpenJDK HotSpot Java 15 for fib(n)

Not the most comprehensive benchmark, but the results are surprising to me.

// (Node.js v14.14.0)
  
const {
  performance
} = require('perf_hooks');

function fib(n) {
    let num1 = 0;
    for (let i = 0, num2 = 1; i < n; ++i) {
        let num3 = (num2 + num1);
        num1 = num2;
        num2 = num3;
    }
    return num1;
}
const t0 = performance.now();
console.log(fib(40));
const t1 = performance.now();
console.log(`${t1 - t0} ms`);

First run: 18ms

Second run: 9ms

// (openjdk 15.0.2 HotSpot)

class Fib {
    static int fib(int n)  {
        int num1 = 0;
        for (int i = 0, num2 = 1; i < n; ++i) {
            int num3 = num2 + num1;
            num1 = num2;
            num2 = num3;
        }
        return num1;
    }

    public static void main(String args[])  {
        long startTime = System.nanoTime();
        System.out.println(fib(40)); 
        long stopTime = System.nanoTime();
        System.out.println((stopTime - startTime) / 1000000);
    }
}

First run: 40ms

Second run: 20ms