Messing around with performance decorators on async methods

perf.js

function measure(target, name, descriptor) {
  const fn = descriptor.value;

  descriptor.value = async function () {
    const mark = `mark_${name}`;
    
    performance.mark(mark);
    const result = await fn();
    performance.measure(mark);
    
    const perf = performance.getEntriesByName(mark);
    // send perf measurements to worker

    clear(mark);

    return result;
  }
}

function clear(mark) {
  performance.clearMarks(mark);
  performance.clearMeasures(mark);
}

// Usage
class ClientAPI {
  @measure
  async retrieve() {
    const result =  await foo();

    return result;
  }
}

function foo() {
  return new Promise(
    (res, rej) => setTimeout(() => res('success'), 3000));
}

(async function () {
  const a = new AsyncFoo();
  const data = await a.retrieve(); 
  
  console.log(data); // => 'success'
}());