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Run results for:
undefined vs. typeof vs. in vs. hasOwnProperty big object
Object lookup performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=576743" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0
Browser:
Chrome 131
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
undefined
174378128.0 Ops/sec
typeof
195581664.0 Ops/sec
in
168991200.0 Ops/sec
hasOwnProperty
68192568.0 Ops/sec
bool
173273216.0 Ops/sec
keys
7644506.5 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5, e1: 5, e2: 5, e3: 5, e4: 5, e5: 5, e6: 5, e7: 5, e8: 5, e9: 5, e0: 5, ea: 5, eb: 5, ec: 5, ed: 5, ee: 5, ef: 5, eg: 5, eh: 5, ei: 5, ej: 5, ek: 5, el: 5, em: 5, en: 5, eo: 5, ep: 5, eq: 5, er: 5, es: 5, et: 5, eu: 5, ev: 5, ew: 5, ex: 5, ey: 5, ez: 5, f1: 5, f2: 5, f3: 5, f4: 5, f5: 5, f6: 5, f7: 5, f8: 5, f9: 5, f0: 5, fa: 5, fb: 5, fc: 5, fd: 5, fe: 5, ff: 5, fg: 5, fh: 5, fi: 5, fj: 5, fk: 5, fl: 5, fm: 5, fn: 5, fo: 5, fp: 5, fq: 5, fr: 5, fs: 5, ft: 5, fu: 5, fv: 5, fw: 5, fx: 5, fy: 5, fz: 5, g1: 5, g2: 5, g3: 5, g4: 5, g5: 5, g6: 5, g7: 5, g8: 5, g9: 5, g0: 5, ga: 5, gb: 5, gc: 5, gd: 5, ge: 5, gf: 5, gg: 5, gh: 5, gi: 5, gj: 5, gk: 5, gl: 5, gm: 5, gn: 5, go: 5, gp: 5, gq: 5, gr: 5, gs: 5, gt: 5, gu: 5, gv: 5, gw: 5, gx: 5, gy: 5, gz: 5};
Tests:
undefined
undefined !== obj.gr;
typeof
'undefined' !== typeof obj.gr;
in
'gr' in obj;
hasOwnProperty
obj.hasOwnProperty( 'gr' );
bool
!! obj.gr;
keys
Object.keys(obj).includes('gr');