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async-chunk-requests's Introduction

async-chunk-requests

Fetch data patterns in javascript with promises

  1. All - start all requests at the same time
  2. Series - process request one by one
  3. Chunks - process requests in chunks

Results for 2000 requests:
all: ❌ Fetch error (too many requests)
series: ✅ 11 min 35 s
chunks: ✅ 1 min 12 s

Example
const { getIdList, fetchPhoto, chunks } = require('./helpers');

const t0 = Date.now();
chunks(getIdList(150), fetchPhoto, 50)
  .then(res => {
    const t1 = Date.now();
    console.log(res)
    console.log(`Fetch time: ${t1 - t0} ms`);
  });

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