A fragment of async-resource-vs-destroy.js (see https://github.com/nodejs/node/pull/31016)

cls-api-benchmark.js

/* AsyncContext (implementation based on WeakMap) */

const kStore = 'store';
function buildAsyncContext(getServe) {
  const asyncContext = new AsyncContext();
  const server = createServer((req, res) => {
    asyncContext.run(() => {
      getServe(getCLS, setCLS)(req, res);
    });
  });

  return {
    server,
    close
  };

  function getCLS() {
    const store = asyncContext.getStore();
    return store.get(kStore);
  }

  function setCLS(state) {
    const store = asyncContext.getStore();
    store.set(kStore, state);
  }

  function close() {
    server.close();
  }
}

/* cls-hooked 4.2.2 */

const cls = require('cls-hooked');

function buildClsHooked(getServe) {
  const ns = cls.createNamespace('cls-hooked-benchmark');
  const server = createServer((req, res) => {
    ns.bindEmitter(req);
    ns.bindEmitter(res);
    ns.run(() => {
      getServe(getCLS, setCLS)(req, res);
    });
  });

  return {
    server,
    close
  };

  function getCLS() {
    return ns.get(kStore);
  }

  function setCLS(state) {
    ns.set(kStore, state);
  }

  function close() {
    server.close();
    cls.destroyNamespace('cls-hooked-benchmark');
  }
}