Run results for: hasOwnProperty vs Object.keys

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:57.0) Gecko/20100101 Firefox/57.0

Browser: Firefox 57

Operating system: Mac OS X 10.13

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
hasOwnProperty	395219.3 Ops/sec
Object.keys	438591.8 Ops/sec

Script Preparation code:

var props = {a:1,b:1,c:1,d:1,e:1,f:1,g:1,h:1,i:1,j:1,k:1,l:1,m:1,n:1,o:1,p:1,q:1,r:1,s:1,t:1,u:1,v:1,w:1,x:1,y:1,z:1};

Tests:

hasOwnProperty
for (var p in props) { if (Object.prototype.hasOwnProperty.call(props, p)) { props[p] = 2; } }
Object.keys
for (var k=Object.keys(props), l=k.length, i=0; i<l; i++) { props[k[i]] = 2; }