Graphics, what is best for performance

OK, so I have searched around I can't really find a concrete answer so what is the best way to deal with a large layout. Mine currently is 6000x6000.

Right now I am using 256x256 tiles to lay the entire background. These consist of about 8 different sprites right now.

Is it better to use less, 512x512 tiles?

One large image (png/jpg)

A tiled 256x256 image, then placing my other sprites as needed to fill in the background?

Thanks.

It better to use smaller tiles. Using a large image it's not recommended.

Imagine SNES uses the smallest resolution like 512 x 240 on canvas window size. It runs very faster with very weak hardware.

I thought using a huge object count (which comes from using tiles) made a big impact on performance? Unless you're using a bland background like in the Ghost Shooter, where it's just a single tiledBG.

You can simply fill the visible area with sprites and swap images as necessary, simulating "moving around". Nothing is outside the visible area. That's the standard practice.

Using one large image should be avoided at all costs - it will waste a huge amount of memory.

Using a series of 256x256 or 512x512 tiles should be fine, but I wouldn't go any smaller than 256, since then you start getting in to higher object counts.

Thanks Everyone

i didn't understand , if the images has the same size will be more faster than the images that has different sizes?

It's a tradeoff between having a single large image (which wastes memory) and thousands of tiny tiles (which will be slow due to increasing the object count). 256-512 sized tiles is a good middleground.