VB.NET性能测试方法之间隔时间(操作耗时)

精确到毫秒，代码如下

'1.csv大小为23.6MB
Dim t1 As Date = Now
Dim tmp() = System.IO.File.ReadAllLines("d:\1.csv")
Dim t2 As Date = Now
Debug.Print("用时：" & (t2 - t1).TotalMilliseconds)

输出结果如下图