Asked about Working with pretrained image models

You need image generation under one second per image. What are your options?

An answer that works

Fewer steps with a better sampler, a distilled few-step model, smaller resolution with upscaling, 16-bit weights and compiled models, batching, and caching repeated prompts. Measure quality on representative prompts at each setting rather than choosing by eye.

Reading an answer is not being able to give one. The section that teaches this is Working with pretrained image models, 3 hours of Diffusion & generative models.

Learn this properly