function reverse(arr) {
        return arr.reduceRight(function(acc, curr) {
          return acc.concat(curr)
        }, []);
    }

    var reverseWorker = workerFn(reverse);

    // generate input
    for(var input = []; input.length < 1000; input.push(input.length));

    reverseWorker(input).then(console.log.bind(console));