I found it frustrated when I found some of my basic assumptions not true.
And I realized that, whatever I am doing, I always assumes something in pervious.
So I use this page to note some interesting assumptions made by me or I met, regardless they are proved true or false finally.
false, when the array is not that long, inserting sort is much faster.
false, it depends on the hardware.
You can check via compiling and run the following codes: