Javascript small benchmark script

js-benchmark.js

function benchmark(method) {
    const start = +(new Date);

    const count = method();

    const end = +(new Date);

    const sec = ((end - start) / 1000) % 60;
    console.log(`Processed in under: ` + sec + 's');
    if (count && typeof count === 'number') {
        console.log('Performance of ' + Math.round(count / sec) + ' op/s');
    }
}

// Usage
function operation() {
    let count = 0;
    while (count < 800000) {
        yourFunc('simple_400x200q40.webp');
        count++;
    }
    return count;
}
benchmark(operation)