Should I reuse Sprites?

I want to make a 2D side scroller, and manually place every sprite. The problem is, if a level is long, it might have 900 sprites in it. I know that they get optimized pretty fast, so most of them are cut right at the CPU stage, but I still wonder about performance.

Should I just have 20-30 sprites, and once one gets out of the screen(through the left side), place it in a new position again(reuse it?)

Or I shouldn't be worried at all, and just use as many sprites as I need?

 

for performance, you need to cull that 900 regardless if going on mobile or it will lose speed on trying to frustum cull it. Reuse is mostly to save ram.

 

Yeah I'm going mobile...thats why I was worried since the beginning. On a device with 512mb ram nothing nice would happen with that amount of sprites.

I'll find a way to reuse the same sprite for objects placed at different locations.