const now = () => Date.now();

const report = {};

const p = wrappedFunction => {
  report[wrappedFunction.name] = { min: 0, max: 0, avg: 0, callCount: 0 };

  const times = [];
  return (...args) => {
    const start = performance.now();
    const returnValue = wrappedFunction(...args);
    const end = performance.now();

    report[wrappedFunction.name].callCount++;
    const elapsed = end - start;
    times.push(elapsed);

    report[wrappedFunction.name].min = Math.min.apply(undefined, times);
    report[wrappedFunction.name].max = Math.max.apply(undefined, times);
    report[wrappedFunction.name].avg = times.reduce((p, c) => p + c, 0) / times.length;

    return returnValue;
  };
};