# Latent Hyperloop

Megapixel image synthesis has concentrated acceleration on denoising, yet cascade pipelines also spend heavily on repeated VAE transitions between latent and pixel space. UltraFlash targets those transitions, replacing the intermediate decode-resize-encode round trip with a learned latent shortcut and making final decoding sparse with smaller overlap. Built on PixelRush, its SD configuration cuts 4K latency from 16.37s to 8.04s while improving FID from 56.50 to 52.38.

Megapixel image synthesis has concentrated acceleration on denoising, yet cascade pipelines also spend heavily on repeated VAE transitions between latent and pixel space. UltraFlash targets those transitions, replacing the intermediate decode-resize-encode round trip with a learned latent shortcut and making final decoding sparse with smaller overlap. Built on PixelRush, its SD configuration cuts 4K latency from 16.37s to 8.04s while improving FID from 56.50 to 52.38.