It’s best if we start by reloading the current page because that starts the test at a known point, but there could be reasons why we don’t want to do that (e.g. the page contains state that will be lost across a reload)
以重新载入当前页面作为起点将得到最佳的效果，因为这将在一个已知的点位开始测试。但也可能因为某些原因使得我们不想这么做（比如页面中包含的状态会在重新载入时丢失）。