Deep JSON Equality performance

main.js

const _ = require('lodash');
const deepEqual = require('deep-equal');
const value_equals = require('toubkal/lib/util/value_equals');
const request = require("request");
const rp = require('request-promise');

let url = "https://gist.githubusercontent.com/drew-wallace/3dd411fc6b969648cd67a02de58b0329/raw/82b2ec2e8c193f0d1affac047a114e95fa159b74/JMdict-all.json";

rp({
  uri: url,
  json: true
}).then(function (a) {
  
  let b = [].concat(a);
  let c = [].concat(a);
  c[c.length - 1] = c[0];
  let t0 = 0;
  let t1 = 0;
  let a1 = 'unanswered';
  let a2 = 'unanswered';
  for(let i = 0; i < 5; i++) {
    console.group('Test ' + (i+1));
    t0 = performance.now();
    a1 = _.isEqual(a,b)
    a2 = _.isEqual(a,c)
    t1 = performance.now();
    console.log("lodash took " + (t1 - t0) + " milliseconds:", a1, a2);

    t0 = performance.now();
    a1 = JSON.stringify(a) === JSON.stringify(b);
    a2 = JSON.stringify(a) === JSON.stringify(c);
    t1 = performance.now();
    console.log("stringify took " + (t1 - t0) + " milliseconds:", a1, a2);

    t0 = performance.now();
    a1 = deepEqual(a,b);
    a2 = deepEqual(a,c);
    t1 = performance.now();
    console.log("deepEqual took " + (t1 - t0) + " milliseconds:", a1, a2);

    t0 = performance.now();
    a1 = value_equals(a,b);
    a2 = value_equals(a,c);
    t1 = performance.now();
    console.log("value_equal took " + (t1 - t0) + " milliseconds:", a1, a2);
    console.groupEnd();
  }
});