Run results for: Is String Set be faster than many equal?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.2 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Test name	Executions per second
✓ With Set	2,912 Ops/sec
Without Set	7 Ops/sec

Script Preparation code:

var fullList = new Array(9000).fill(0).map((e,i)=>`${i}::${crypto.randomUUID()}`);
var k01 = new Array(9000).fill(0).map((e,i)=>Math.random()>0.5);
var k02 = new Array(9000).fill(0).map((e,i)=>Math.random()>0.5);
var s01 = fullList.map((e,i)=>k01[i]?e:null).filter(e=>e);
var s02 = fullList.map((e,i)=>k02[i]?e:null).filter(e=>e);
var f01 = new Function('key', s01.map(e=>`if(key==='${e}')return true;`).join('\n')+'return false;');
var f02 = new Function('key','s', `if(s.has(key))return true;`+'return false;');
var st = new Set(s01);


var test01 = function(){
  const main = s01;
  const loop = s02;
  let result = 0;
  let ui = 0;
  for(let s of loop){
    ui++;
    if(f01(s))continue;
    result += ui;
  }
  return result;
}

var test02 = function(){
  const main = s01;
  const loop = s02;
  let result = 0;
  let ui = 0;
  for(let s of loop){
    ui++;
    if(f02(s, st))continue;
    result += ui;
  }
  return result;
}

console.log('test01',test01());
console.log('test02',test02());

Run results for: Is String Set be faster than many equal?

Without Set

With Set