JSFiddle - React, Tailwind, and code Playground

JavaScript

var rnd = 4;

var arr = [];
for (var i=0, t=100000; i<t; i++) {
    arr.push(Math.round(Math.random() * t))
}

const dddd = new Date().getDate();

const start = performance.now();
const char = +arr
 .map((item) => item * item)
 .filter((item) => !(item % dddd))
 .map((item) => Math.sqrt(item))
 .filter((item) => item / rnd < length)
 .join("");
 const end = performance.now();
 
 console.log("1:", end-start);
 console.log(char);