ios navgationTiming的responseStart > responseEnd? 会使什么原因造成的

Question

1. 如题。
   场景：iOS 的webview 在频繁切换页面的情况下会出现responseStart > responseEnd的情况

访问： http://xw.qq.com/index.htm

{
    "navigationStart": 1498131593687,
    "redirectStart": 0,
    "redirectEnd": 0,
    "fetchStart": 1498131593687,
    "domainLookupStart": 1498131593702,
    "domainLookupEnd": 1498131593707,
    "connectStart": 1498131593714,
    "secureConnectionStart": 1498131593731,
    "connectEnd": 1498131593731,
    "requestStart": 1498131593733,
    "responseStart": 1498131593740,
    "responseEnd": 1498131587076,
    "unloadEventStart": 0,
    "unloadEventEnd": 0,
    "domLoading": 1498131593713,
    "domInteractive": 1498131593890,
    "domContentLoadedEventStart": 1498131593890,
    "domContentLoadedEventEnd": 1498131593894,
    "domComplete": 1498131594897,
    "loadEventStart": 1498131594899,
    "loadEventEnd": 1498131594901,
    "pageTime": 1498131596323
}

Answer 1

还真没注意过这种情况，刚才看了规范，不太像正常情况，怀疑是webview的实现bug。
麻烦再详述一下重现步骤：如果能高频重现，就提交一个bug给iOS~