const large=new Array(1000).fill("nemo"); function FindNemo(array) { let t0=performance.now(); for(let i=0;i<large.length;i++) { if(array[i]==='nemo') { console.log("Nemo found"); } } let t1=performance.now(); console.log('Time taken:'+(t1-t0)+'ms') } FindNemo(large);