Test to calculate rate of operations

timing.js

// Averages the rate of operations over time since program started
const roundTo100ths = (num) =>  {
    return Math.round(num * 100)/100;
};

const start = new Date();
let ticks = 0;
const timeout = process.env.INTERVAL_TIMEOUT_MS || 1000;

setInterval(() => {
    ticks += 1;
    if (ticks % 10 === 0) {
        const diff = new Date() - start;
        console.log(roundTo100ths(ticks / (diff / 1000)) + ' ops / second');
    }
}, timeout);