Benchmark: Map vs Object (R+W)

Script Preparation code:

var map = new Map();
var obj = {};
var count = 10000;
var i = 0, a;

Tests:

Map
for (i = 0; i < count; i++) { map.set((i * 10000).toString(), i); } for (i = 0; i < count; i++) { a = map.get((i * 10000).toString()); }
Object
for (i = 0; i < count; i++) { obj[(i * 10000).toString()] = i; } for (i = 0; i < count; i++) { a = obj[(i * 10000).toString()]; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Map
Object

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:86.0) Gecko/20100101 Firefox/86.0

Browser/OS: Firefox 86 on Mac OS X 10.15

Test name	Executions per second
Map	218.9 Ops/sec
Object	217.1 Ops/sec

Map vs Object (R+W) (version: 0)