Benchmark various JavaScript libs for recursive conversion of object keys from underscore_case to camelCase.

-README.adoc

Benchmark

Results

humps x 3,050 ops/sec ±2.32% (76 runs sampled)
camelcase-keys-recursive x 2,194 ops/sec ±3.16% (65 runs sampled)
camelify-recursive x 1,491 ops/sec ±2.64% (74 runs sampled)
camelize x 3,481 ops/sec ±2.27% (75 runs sampled)
camelscore x 3,280 ops/sec ±2.66% (68 runs sampled)
dolittlejs x 3,230 ops/sec ±2.13% (70 runs sampled)
Fastest is camelize

Testing Environment

• node v5.3.0

• OS X 10.9.5

• Intel Core i5 2.3 GHz

data.json

{
  "meta": {
    "count": 2,
    "offset": 0,
    "limit": 20
  },
  "events": [
    {
      "id": 42,
      "name": null,
      "sequence_number": 12,
      "starts_at": "2014-04-23T09:15:00.000+02:00",
      "ends_at": "2014-04-23T10:45:00.000+02:00",
      "deleted" : false,
      "capacity": 24,
      "event_type": "tutorial",
      "parallel": "106",
      "original_data": {
        "starts_at": "2014-04-23T09:00:00.000+02:00",
        "ends_at": "2014-04-23T10:30:00.000+02:00",
        "room_id": "T9:111"
      },
      "links": {
        "room": "T9:350",
        "course": "MI-RUB",
        "teachers": [
          "skocdopet"
        ],
        "students": [
          "szolatib",
          "vomackar"
        ],
        "applied_exceptions": [ 10, 15 ]
      }
    },
    {
      "id": 43,
      "name": null,
      "sequence_number": 12,
      "starts_at": "2014-04-24T09:15:00.000+02:00",
      "ends_at": "2014-04-24T10:45:00.000+02:00",
      "deleted" : false,
      "capacity": 196,
      "event_type": "lecture",
      "parallel": "1",
      "original_data": {},
      "links": {
        "room": "T9:155",
        "course": "MI-W20",
        "teachers": [
          "kuchajar",
          "vitvatom"
        ],
        "students": [
          "jirutjak"
        ]
      }
    }
  ]
}

index.js

'use strict'

const Benchmark = require('benchmark')
const R = require('ramda')

const humps = require('humps')
const camelCaseRecursive = require('camelcase-keys-recursive')
const camelify = require('camelify-recursive')
const camelize = require('camelize')
const camelscore = require('camelscore')
const dolittle = require('dolittlejs')


const dataJson = require('./data.json')
const testData = () => JSON.parse(JSON.stringify(dataJson))

const suite = new Benchmark.Suite

suite
  .add('humps', () => {
    humps.camelizeKeys(testData())
  })
  .add('camelcase-keys-recursive', () => {
    camelCaseRecursive(testData())
  })
  .add('camelify-recursive', () => {
    camelify(testData())
  })
  .add('camelize', () => {
    camelize(testData())
  })
  .add('camelscore', () => {
    camelscore.camelize(testData())
  })
  .add('dolittlejs', () => {
    dolittle.to.camel(testData())
  })

  .on('cycle', event => {
    console.log(String(event.target))
  })
  .on('complete', function() {
    console.log('Fastest is ' + this.filter('fastest').map('name'))
  })
  .on('error', event => {
    console.log(event.target + 'ERROR!')
  })

  .run({ 'async': true })

package.json

{
  "dependencies": {
    "benchmark": "^2.0.0",
    "camelcase-keys-recursive": "^0.8.1",
    "camelify-recursive": "^1.0.1",
    "camelize": "^1.0.0",
    "camelscore": "^0.1.2",
    "change-case": "^2.3.0",
    "dolittlejs": "^0.1.4",
    "es6-shim": "^0.34.1",
    "humps": "^1.0.0",
    "microtime": "^2.0.0",
    "ramda": "^0.19.1"
  }
}