Run results for: test spread in reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36

Browser: Chrome 73

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
mutable	655867.2 Ops/sec
immutable	358820.6 Ops/sec

Tests:

mutable
[...Array(10).keys()].reduce((acc, val) => { acc[val] = val; return acc; }, {})
immutable
[...Array(10).keys()].reduce((acc, val) => { return { ...acc, [val]: val }; }, {})