Использовать debounce вместо setTimeout?

const debounce = (fn, ms) => { 
  let dfn = (...args) => { 
    let rest = +dfn.next - Date.now(); 
    dfn.next = (dfn.next ? dfn.next : Date.now()) + ms; 
    setTimeout(() => fn(...args), rest > 0 ? rest + ms : ms); 
  } 
  return dfn; 
} 
 
 
let fn = debounce( 
  i => console.log(i, Date.now()), 
  200 
); 
for (let i = 1; i <= 30; ++i) { 
  setTimeout(() => fn(i)) 
} 
console.log(30, 'calls queued');

const debounce = (fn, ms) => { 
  let dfn = (...args) => { 
    let rest = +dfn.next - Date.now(); 
    dfn.next = (dfn.next ? dfn.next : Date.now()) + ms; 
    return new Promise(ok =>  
       setTimeout( 
         () => ok(fn(...args)),  
         rest > 0 ? rest + ms : ms 
       )); 
  } 
  return dfn; 
} 
 
const getSleep = ms => debounce( 
  () => Promise.resolve(),  
  ms 
); 
const sleep = getSleep(200); 
 
(async() => { 
  let start = Date.now(); 
  await sleep(); 
  await sleep(); 
  await sleep(); 
  await Promise.all([sleep(), sleep(), sleep()]); 
  console.log(`wake up after ${Date.now() - start}ms`);  // 1200ms = 200 * 6 
})()