JS代码生成的GUID似乎太短

Question

JS代码：

!1 === b.cache && a.query.set("_ksTS", d.now() + "_" + d.guid()));

对于这行代码我的理解是生成一个时间戳并生成一个guid,但是这行代码在网页上最终出来的效果是：_ksTS: 1647352680089_1157；可是据我所知，guid出来的结果应该都是十几位的才对啊。
望各位师傅能不吝赐教。
PS:下面是完整代码：

KISSY.add("io/base", ["event/custom", "promise"], function(d, f) {
    function i(b) {
        var a = b.context;
        delete b.context;
        b = d.mix(d.clone(n), b, {
            deep: !0
        });
        b.context = a || b;
        var l, j = b.type, g = b.dataType, a = b.uri = m.resolve(b.url);
        b.uri.setQuery("");
        "crossDomain"in b || (b.crossDomain = !b.uri.isSameOriginAs(m));
        j = b.type = j.toUpperCase();
        b.hasContent = !e.test(j);
        if (b.processData && (l = b.data) && "string" !== typeof l)
            b.data = d.param(l, void 0, void 0, b.serializeArray);
        g = b.dataType = d.trim(g || "*").split(c);
        !("cache"in b) && d.inArray(g[0], ["script", "jsonp"]) && (b.cache = !1);
        b.hasContent || (b.data && a.query.add(d.unparam(b.data)),
        !1 === b.cache && a.query.set("_ksTS", d.now() + "_" + d.guid()));
        return b
    }
 

Answer 1

生成guid的方法没发出来。
生成多长的guid取决于需求，能满足需求多短都行。