array object filter

filter.js

function randomIntFromInterval(min, max) { // min and max included 
  return Math.floor(Math.random() * (max - min + 1) + min)
}

function makeid(length) {
    var result           = '';
    var characters       = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    var charactersLength = characters.length;
    for ( var i = 0; i < length; i++ ) {
      result += characters.charAt(Math.floor(Math.random() * 
 charactersLength));
   }
   return result;
}

const createObject = () => {
    return {
        a: makeid(randomIntFromInterval(0,20)),
        b: makeid(randomIntFromInterval(0, 20)),
        c: makeid(randomIntFromInterval(0, 20)),
        d: makeid(randomIntFromInterval(0, 20)),
        e: makeid(randomIntFromInterval(0, 20)),
        f: makeid(randomIntFromInterval(0, 20)),
    }
}


let array = []

for (let i = 0; i < 15000; i++) {
    array.push(createObject());
}

const needle = 'a';

console.time("find needle")
const filteredArray = array.filter((item) => {
    return item.a.startsWith(needle) || item.b.startsWith(needle)  || item.c.startsWith(needle) 
})

console.timeEnd("find needle")
console.log({filteredArray})