Benchmark: Map vs Object vs Set lookup and add and lookup ugh

Script Preparation code:

var map = new Map();
var obj = {};
var set = new Set();

var ary = [];
var ary2 = [];
for (let i=0; i<10000; i++) {
  ary.push(Math.random());
  ary2.push(Math.random());
}

Tests:

m
for (let a of ary) { if (!map.has(a)) map.set(a, true); } for (let a of ary) { const x = map.has(a); } for (let a of ary2) { const x = map.has(a); }
o
for (let a of ary) { if (obj[a] === undefined) obj[a] = true; } for (let a of ary) { const x = !!obj[a]; } for (let a of ary2) { const x = !!obj[a]; }
s
for (let a of ary) { if (!set.has(a)) set.add(a); } for (let a of ary) { const x = set.has(a); } for (let a of ary2) { const x = set.has(a); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
m
o
s

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
m	1355.8 Ops/sec
o	206.1 Ops/sec
s	1425.2 Ops/sec

Related benchmarks:

Map vs Object vs Set lookup and add and lookup ugh (version: 0)

Comparing performance of: m vs o vs s

Created: 3 years ago by: Registered User

Jump to the latest result

m

o

s

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A