The pixel plotting functions are definitely faster and Blitz Plus has been optimized for 2d only.
It also seems to have a few functions that improve performance - like setting the graphics driver to 1 and using the dynamic setting (2) when loading graphics.
eg)
SetGfxDriver 1 ; set mode & driver
Graphics GFX_WIDTH,GFX_HEIGHT,0,1
Global graphics_handle=LoadImage "<graphics file>",2)
It also seems to have a few functions that improve performance - like setting the graphics driver to 1 and using the dynamic setting (2) when loading graphics.
eg)
SetGfxDriver 1 ; set mode & driver
Graphics GFX_WIDTH,GFX_HEIGHT,0,1
Global graphics_handle=LoadImage "<graphics file>",2)