chore(protocol): fix a performance issue

[erfanium]

makes driver 4.6 times faster

test:

const times: number[] = [];

for (let i = 0; i < 100; i++) {
  const t0 = performance.now();
  const result = await col.find({}).toArray();
  const t1 = performance.now();
  assertEquals(result.length, 494); // just to make sure all docs received 
  times.push(t1 - t0);
}

const avg = times.reduce((a, b) => a + b, 0) / times.length;

console.log(took ${avg} ms);

before result: took 42.91281719999999 ms
after result: took 9.241063190000006 ms
nodejs result: 6.83 ms

[manyuanrong]

Nice work!