any performance enhancements greatly appreciated

alg.js

function * reorder (current, bucket) {
  if (bucket.length === 0) yield current;
  else if (bucket.length === 1) yield current.concat(bucket)
  else if (bucket.length > 1)
  for (let i = 0; i < bucket.length; i++) {
    yield* reorder([...current, bucket[i]], [...bucket.slice(0, i), ...bucket.slice(i + 1)])
  }
}