Benchmark: defineproperty (data property) vs direct assignment

Tests:

a
var target = {}; var key = 'something'; for (var i=0; i<1000; i++) { Object.defineProperty(target, key+i, { configurable: true, enumerable: true, writable: false, value: undefined, }); }
b
var target = {}; var key = 'something'; for (var i=0; i<1000; i++) { target[key+1] = undefined; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
a
b

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Goanna/6.8 PaleMoon/34.0.1

Browser/OS: Pale Moon (Firefox Variant) 34 on Linux

27K/s

1K/s

View exact numbers

Test name	Executions per second
✓ b	27,462 Ops/sec
a	1,125 Ops/sec

defineproperty (data property) vs direct assignment (version: 1)