benchmark-propsOrId.js

benchmark-propsOrId.js

const _ = require('lodash');
const mongoose = require('mongoose');
const Benchmark = require('benchmark');

const { ObjectId } = mongoose.Types;

const isObjectId = (id) => id instanceof ObjectId;

function withCond(props, value) {
  return _.cond([
    [isObjectId, _.toString],
    [_.isObject, _.partialRight(_.pick, props)],
    [_.stubTrue, _.identity]
  ])(value);
}

function vanilla(props, value) {
  if (isObjectId(value)) {
    return value.toString();
  }
  if (_.isObject(value)) {
    return _.pick(value, props);
  }
  return value;
}

const ID = new ObjectId('01234567890123456789abcd');
const OBJECT = {
  foo: 'bar',
  _id: ID
};

const suite = new Benchmark.Suite();

suite
  .add('withCond', () => {
    withCond(ID.toString());
    withCond(['foo', '_id'], OBJECT);
    withCond(['foo', '_id'], ID);
  })
  .add('vanilla', () => {
    vanilla(ID.toString());
    vanilla(['foo', '_id'], OBJECT);
    vanilla(['foo', '_id'], ID);
  })
  .on('cycle', (event) => {
    console.log(String(event.target));
  })
  .run();

$ node benchmark-propsOrId.js 
withCond x 139,858 ops/sec ±1.43% (91 runs sampled)
vanilla x 1,138,312 ops/sec ±0.92% (93 runs sampled)