Run results for: merge preformance compare 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser: Chrome 117

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
lodash merge	480268.6 Ops/sec
Object.assign	1042946.9 Ops/sec
spread	2148282.5 Ops/sec
immutable	651891.6 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

<script src='https://cdnjs.cloudflare.com/ajax/libs/immutable/4.3.4/immutable.min.js'></script>

Script Preparation code:

var a = {
        lastPrice: '1234.345',
        contractVal: 109,
        marginAsset: 'GET',
        baseAsset: 'ASG',
        quoteAsset: 'ASFE',
        quantityPrecision: 8,
        pricePrecision: 4,
        equalQtyPrecision: 6,
        tickSize: 0.001,
        limitStepSize: 0.001,
        marketStepSize: 0.01,
      };
var p = {
adl: 1234,
  askNotional: 2345236,
  bidNotional: 34636,
  collateral: 'AFE',
  marginAsset: 'EJG',
  cumRealized: 142565,
  entryPrice: 2356,
  id: '3452562',
  isolated: true,
  isolatedWallet: 1225,
  leverage: 23,
  markPrice: 34346,
  lastPrice: 567458,
  initialMarkPrice: 23456,
  notionalValue: 345346,
  positionSize: 45748,
  positionSide: 'ASGO',
  symbol: 'ASGT',
  unrealizedProfit: 1235,
  selectPrice: 12345,
  pushTime: 12435634578
}
var b = {
        collateral: 'ASDG',
        askNotional: 1245,
        bidNotional: 3467,
        cumRealized: 5736,
        entryPrice: 23567,
        isolatedWallet: 23536,
        markPrice: 23678,
        notionalValue: 347345,
        positionSize: 3245247,
        unrealizedProfit: 3477,
      };

Tests:

lodash merge
var c = _.merge({}, a, p, b);
Object.assign
var c = Object.assign({}, a, p, b);
spread
var c = {...a, ...p, ...c};
immutable
var c = Immutable.merge(a, p, c);

Run results for: merge preformance compare 2

lodash merge

Object.assign

spread

immutable