Reviewing / Measuring / Timing O(n) performance using JavaScript, NFL Players, functions, for loops, and performance.now(). For use in browser, not node.js.

bigOPerformance.js

const players = [
  'Tom Brady', 
  'Aaron Rodgers',
  'Drew Brees',
  'Ben Roethlisberger',
  'Philip Rivers',
  'Aqib Talib',
  'Alex Smith', 
  'Larry Fitzgerald'
];

function getPlayer(player, array) {
    let t0 = performance.now();
    for (let i = 0; i < array.length; i++ ) {
        if (array[i] === player) {
            console.log('Found player', player);
        }
    }
    let t1 = performance.now();
    console.log(`t0= ${t0} t1 = ${t1}`);
    console.log(`Finding player ${player} took ${t1-t0} milliseconds.`);
}

getPlayer('Philip Rivers', players);