Benchmark: Object spread vs New map with string keys

Script Preparation code:

var data = new Array(100000).fill(undefined).map((_,i) => i)
var obj = data.reduce((obj, idx) => {obj['idx' + idx] = idx; return obj}, {});
var map = new Map(Object.entries(obj));

Tests:

Obj spread
let a = {...obj};
new Map
let a = new Map(map);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Obj spread
new Map

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser/OS: Chrome 103 on Mac OS X 10.14.4

View result in a separate tab

Test name	Executions per second
Obj spread	16.4 Ops/sec
new Map	74.1 Ops/sec

Object spread vs New map with string keys (version: 0)

Comparing performance of: Obj spread vs new Map

Created: one year ago by: Guest

Jump to the latest result

Obj spread

new Map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A