sharp.metadata() vs probe-image-size benchmarks

tiff_metadata_benchmarks.js

#!/usr/bin/env node

const AWS = require('aws-sdk');
const Benchmark = require('benchmark');
const fs = require('fs');
const probe = require('probe-image-size');
const sharp = require('sharp');

function * urlGenerator () {
  const ring = fs.readFileSync('./s3Urls.txt').toString().split(/\n/);
  while (true) {
    for (const id of ring) yield id;
  }
}

function createReadStream (url) {
  const s3 = new AWS.S3();
  const { host, pathname } = new URL(url);
  return s3.getObject({ Bucket: host, Key: pathname.replace(/^\//, '') }).createReadStream();
}

async function sharpMetadata (url) {
  const meta = sharp({ page: 0, sequentialRead: true });
  const result = await createReadStream(url).pipe(meta).metadata();
  return result;
}

async function probeMetadata (url) {
  const result = await probe(createReadStream(url));
  return result;
}

let urls = urlGenerator();
const suite = new Benchmark.Suite();
suite
  .add('sharp.metadata()', async function () {
    await sharpMetadata(urls.next().value);
  })
  .add('probe()', async function () {
    await probeMetadata(urls.next().value);
  })
  .on('cycle', function ({ target }) {
    console.log(String(target));
    urls = urlGenerator();
  })
  .on('complete', function () {
    console.log('Fastest is', suite.filter('fastest').map('name'));
  })
  .run({ async: true, minSamples: 50 });