set-timeout-delay.ts

const t0 = performance.now();
for (let i = 0; i < 1e9; i++) {}
const t1 = performance.now();
console.log(`"for" loop took ${t1 - t0}ms`);
 
setTimeout(() => {
  const t0setTimeout = performance.now();
  for (let i = 0; i < 1e9; i++) {}
  const t1setTimeout = performance.now();
  console.log(`"for" loop inside "setTimeout" took ${t1setTimeout - t0setTimeout}ms`);
});
 
setTimeout(() => {
  console.log('second "setTimeout" callback');
});