Map<string, T> vs. Record<string, T> (v2)

Revision 2 of this benchmark created on

Description

In this example, we evaluate the overhead of Map against plain objects in JavaScript. When Map keys are strings, both approaches can be used.

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Testing in
TestOps/sec
Map
const map = new Map()
let half = false;
for (let i = 0; i < 1000; i++) {
	map.set(`Item ${i}`, { hello: 'world' })
	if (map.get(`Item ${1000 - i}`)) half = true;
}
ready
Plain object
const map = {}
let half = false;
for (let i = 0; i < 1000; i++) {
	map[`Item ${i}`] = { hello: 'world' }
	if (map[`Item ${1000 - i}`]) half = true;
}
ready
Plain object (without prototype)
const map = {}
map.prototype = null
let half = false;
for (let i = 0; i < 1000; i++) {
	map[`Item ${i}`] = { hello: 'world' }
	if (map[`Item ${1000 - i}`]) half = true;
}
ready

Revisions

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