wrapMethods.js

const wrap = (obj, method) => {
  const oldMethod = obj[method]
  async function innerMethod(...args) {
    const start = Date.now()
    try {
      const ret = await oldMethod.call(obj, ...args)
      console.log(method, 'took', Date.now() - start, args[0])
      return ret
    } catch (error) {
      console.log(method, 'took', Date.now() - start)
      throw error
    }
  }
  Object.assign(obj, { [method]: innerMethod })
}

function wrapMethods(obj) {
  for (const method in obj) {
    if (typeof obj[method] === 'function') {
      wrap(obj, method)
    }
  }
}

wrapMethods(AsyncStorage)