Run results for: Loop over object: lodash.forOwn vs Object.keys().forEach with songbird2

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.3.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
lodash.forOwn	6511.2 Ops/sec
Object.keys().forEach	4916.1 Ops/sec
for..in	4480.1 Ops/sec
lodash.forOwn (looping subObj)	644.5 Ops/sec
Object.keys().forEach (looping subObj)	400.9 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://raw.githubusercontent.com/duereg/songbird/master/lib/songbird.js"></script>

Script Preparation code:

var subObj = Array.from({ length: 10 }).map((value, i) => i).reduce((val, v) => { val[v] = v; return val; }, {})
var obj = Array.from({ length: 1000 }).map((value, i) => i).reduce((val, v) => { val[v] = v; return val; }, {})
var cb = (v, k) => { v.a = 10; v.b = 20; }

Tests:

lodash.forOwn
_.forOwn(obj, function(v, k) { cb(v, k); });
Object.keys().forEach
Object.keys(obj).forEach(function (k) { let v = obj[k]; cb(v, k); });
for..in
for (const k in obj) { if (obj.hasOwnProperty(k)) { let v = obj[k]; cb(v, k); } }
lodash.forOwn (looping subObj)
_.forOwn(obj, function(v, k) { _.forOwn(subObj, function(v1, k1) { cb(v, k); }); });
Object.keys().forEach (looping subObj)
Object.keys(obj).forEach(function (k) { const v = obj[k]; Object.keys(subObj).forEach(function (k1) { const v1 = subObj[k1]; cb(v, k); }); });

Run results for: Loop over object: lodash.forOwn vs Object.keys().forEach with songbird2

lodash.forOwn

Object.keys().forEach

for..in

lodash.forOwn (looping subObj)

Object.keys().forEach (looping subObj)