loopyfunctioney.js

// Try running this file in Node 8.2.1
// Try running this file in Node 8.3.0
// Try running this file in d8 for Node 8.3.0

function empty() {}
let i, j, d;

for(j = 0; j < 5; j++) {
  d = Date.now();
  for (i = 0; i < 1e7; i++) {
    empty();
  }
  console.log(j, 0, Date.now() - d);

  d = Date.now();
  for (i = 0; i < 1e7; i++) {
    empty();
  }
  console.log(j, 1, Date.now() - d);

  d = Date.now();
  for (i = 0; i < 1e7; i++) {
    empty();
  }
  console.log(j, 2, Date.now() - d);
}