What is the fastest way to send lots of fetch requests

I'm sending around 0 - 10 000 fetch requests with JavaScript.

Currently I'm returning a promise that contains a for loop that loops through the fetch requests. This is extremely slow however.

await new Promise((resolve, reject) => {
  for (let i = 0; i < 10 000; i++) {
    let promise = fetch(`website.com/page={i}`)
    .then() // process data

    promise_array.push(prom);


  Promise.allSettled(promise_array).then(() => {
    resolve();
  })
}

What is a more efficient way to do this?