background parrallax too heavy

[0xDE57]

don't prematurely optimize, but SpaceParallaxSystem currently has massive off screen tile over draw... with 5 layers the cost is massive. too many textures

1280x720 we only need 3-4 x and 2-3 y -> 6 - 12 tiles max. currently there are 35 per layer for a total of 175?! bad!
1920x1080 currently there are 63 per layer for a total of 315?! terrible!
2560x1440 currently there are 91 per layer for a total of 455?! absurd!

4k must be an absolute disaster...

after some profiling: it is the batch flushing that is the issue more than the number of tiles.

[0xDE57]

might be better off replacing with a shader but not sure how to achieve similar effect in a shader...

[0xDE57]

asprof says com/spaceproject/systems/SpaceParallaxSystem.drawParallaxTiles is too heavy (~43% @ 1440p)!

rendering tiles is calling switchTexture and batch flush

./asprof -d 30 -f /tmp/flamegraph.html <PID>

With Vsync off, fullscreen @ 1440p I get ~600-700 FPS with tile render on vs ~1300-1400 FPS with tile render off.

This is a pretty significant performance hit.