Run results for: moment duration vs ms

Test name	Executions per second
✓ ms	17,330,398 Ops/sec
moment	955,908 Ops/sec
Script Preparation code:
var s = 1e3,
    m = 60 * s,
    h = 60 * m,
    d = 24 * h,
    w = 7 * d,
    y = 365.25 * d;

function parse(e) {
    if (!((e = String(e)).length > 100)) {
        var r = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(e);
        if (r) {
            var a = parseFloat(r[1]);
            switch ((r[2] || "ms").toLowerCase()) {
                case "years":
                case "year":
                case "yrs":
                case "yr":
                case "y":
                    return a * y;
                case "weeks":
                case "week":
                case "w":
                    return a * w;
                case "days":
                case "day":
                case "d":
                    return a * d;
                case "hours":
                case "hour":
                case "hrs":
                case "hr":
                case "h":
                    return a * h;
                case "minutes":
                case "minute":
                case "mins":
                case "min":
                case "m":
                    return a * m;
                case "seconds":
                case "second":
                case "secs":
                case "sec":
                case "s":
                    return a * s;
                case "milliseconds":
                case "millisecond":
                case "msecs":
                case "msec":
                case "ms":
                    return a;
                default:
                    return
            }
        }
    }
}

function fmtShort(e) {
    var r = Math.abs(e);
    return r >= d ? Math.round(e / d) + "d" : r >= h ? Math.round(e / h) + "h" : r >= m ? Math.round(e / m) + "m" : r >= s ? Math.round(e / s) + "s" : e + "ms"
}

function fmtLong(e) {
    var r = Math.abs(e);
    return r >= d ? plural(e, r, d, "day") : r >= h ? plural(e, r, h, "hour") : r >= m ? plural(e, r, m, "minute") : r >= s ? plural(e, r, s, "second") : e + " ms"
}

function plural(s, e, r, a) {
    var n = e >= 1.5 * r;
    return Math.round(s / r) + " " + a + (n ? "s" : "")
}

function ms(s, e) {
    e = e || {};
    var r = typeof s;
    if ("string" === r && s.length > 0) return parse(s);
    if ("number" === r && isFinite(s)) return e.long ? fmtLong(s) : fmtShort(s);
    throw new Error("val is not a non-empty string or a valid number. val=" + JSON.stringify(s))
};