The difference between OpenGL single buffer and double buffering

The difference between OpenGL single Buffering and double buffering:

Single buffering, is actually all the drawing instructions in the window execution, is directly in the window drawing, such a drawing efficiency is relatively slow, if the use of a single buffer, and the computer is relatively slow, the screen will blink.
double buffering, the actual drawing instruction is completed in a buffer, here the drawing is very fast, after the drawing instruction is completed, and then through the exchange of instructions to the completed graphics immediately displayed on the screen, which avoids the appearance of incomplete drawings, and high efficiency. In
General, OpenGL drawings are double-buffered, and a single buffer is typically used only to display a single, non-dynamic image.