JSFiddle - React, Tailwind, and code Playground

HTML

<script>

function ratio() {
    let s=performance.now();
    let r=0;
    for (let i=0; i<10000000; i++) r+=1;
    t1=performance.now()-s;

    s=performance.now();
    r=0;
    for (let i=0; i<1000000; i++) r+="bladibla".match(/bla/)[0].length;
    t2=performance.now()-s;
    return t2/t1;
}

let r=0;
for (let i=0; i<10; i++) r+=ratio()/10;
alert(r);

</script>