Promises in batches

Previously at Things we learn #

Parallel execution of promises:

await Promise.all(arrayOfPromises);

Sequential execution of promises:

for (const promise of arrayOfPromises) {
  await promise;
}

Today: Promises in batches #

Combine sequential and parallel execution:

const _ = require("lodash");

async function runInBatches(arrayOfPromises, batchSize = 10) {
  const batch = _.chunk(arrayOfPromises, batchSize);
  let results = [];
  for (const batch of batches) {
    results = results.concat(await Promise.all(batch));
  }
  return results;
}

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