Okay, I set up an application that runs several tests and outputs the results to the console. It tests the speed of functions like set pixel, draw line, save, etc.
The result is copied to the clipboard (with bbcode formatting), just paste it here.
I'll start right away:
Create: 0.002s - [color:#800000]3.99x as slow[/color]
Resize: 0.121s - [color:#008000]1.37x as fast[/color]
Add Point: 0.006s - [color:#008000]1.05x as fast[/color]
Polygon: 0.465s - [color:#008000]1.09x as fast[/color]
Pixel: 2.773s - [color:#008000]1.01x as fast[/color]
Ellipse: 0.356s - [color:#008000]1.46x as fast[/color]
Load Bitmap: 0.003s - [color:#008000]1.87x as fast[/color]
[color:#008000]Surface was 1.07267x as fast[/color]