What is the most efficient way of drawing many 2D sprites ?

Hello,

I'm trying to find an efficient way of drawing many 2D sprites to the screen at once. I've looked a bit on these forums and on the internet, and three main methods seem to stick out : Gui.DrawTexture, Graphics.DrawTexture, and creating a GameObject with a sprite. I'm currently using Gui.DrawTexture, however my game will sometimes drop in framerate with GFX.WaitForPresent taking around 85-90% of my frame time. Will changing to Graphics.DrawTexture or the gameObject method change anything ? Also isn't creating a gameObject to draw a sprite much less efficient than simply calling a DrawTexture function, seeing as it adds quite a bit of overhead.

Thank you for your time and answers,