c++ - Sequential and running in one thread time difference c++

Question

Here is my source code for testing multithread performance in C++. Please tell me why is time about 5x smaller for ONE thread running(WaitForMultipleObject()) then first sequential performance. I expect almost same result for sequential performance and running with only one thread. Thanks

http://pastebin.com/EeJ5qW03

Answer 1

操作系统将决定您的线程何时开始运行，它还将决定是否需要调度。除此之外，它还必须为您的线程创建一个单独的堆栈，也许。

阅读有关线程创建的开销。总而言之，开销是系统特定的。