Run results for: defineproperty vs direct assignment value

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

Browser: Firefox 57

Operating system: Windows

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
a	2479.5 Ops/sec
b	27744.4 Ops/sec

Tests:

a
var target = {}; var key = 'something'; for (var i=0; i<1000; i++) { const descriptor = Object.create(null); descriptor.value = 5; Object.defineProperty(target, key+i, descriptor); }
b
var target = {}; var key = 'something'; for (var i=0; i<1000; i++) { target[key+1] = 5; }