foo.js

// Setup
const foo = [];
for (let i = 0; i < 10000000; i++) foo.push([8, null], [8, 99]);

const start = performance.now();

// Bench
for (const c of foo) Math.max(c[0], c[1] || 0);

const end = performance.now();
console.log((end - start).toFixed(2), 'ms');

results.txt

> for i in {0..5}; do /p/google3/v8/out.gn/x64.release/d8 test.js; done
231.06 ms
222.25 ms
222.82 ms
231.02 ms
228.40 ms