Benchmark: Map vs WeakMap - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const getInt = (()=>{r=Math.random;f=Math.floor;return (a=0,b=0x100000000)=>f(r()*(b-a))+a})();
const getStr = (()=>{
    const f = (n)=> n < 10 ? 0x30 + n : n < 36 ? 0x41 + (n - 10) : 0x61 + (n - 36);
    return (n)=> String.fromCharCode(...(new Int32Array(n)).map(()=>f(getInt(0,62)))); 
})();

const keys = [];
const N = 0x40000;

const map = new Map();
const weakmap = new WeakMap();

for(i=0;i<N;i++){
	let key = {i};
  	let value = getInt();
	map.set(key,value);
	weakmap.set(key,value);
	keys[i] = key;
}

Tests:

Map
var a = map.get(keys[getInt(0,N)]);
WeakMap
var a = weakmap.get(keys[getInt(0,N)]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map
WeakMap

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser/OS: Firefox 147 on Windows

View result in a separate tab

Test name	Executions per second
Map	168248128.0 Ops/sec
WeakMap	167431136.0 Ops/sec

Related benchmarks:

Map vs WeakMap (version: 5)

Comparing performance of: Map vs WeakMap

Created: 5 months ago by: Registered User

Jump to the latest result

Map

WeakMap

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A