[Feature] Detailed Break down of time spend on Launching SGLang Diffusion

Checklist

• If this is not a feature request but a general question, please start a discussion at https://github.com/sgl-project/sglang/discussions. Otherwise, it will be closed.
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Motivation

Diffusion and LLM have huge differences in compute characteristics. We want to have a detailed optimization of the launch time spent on SGLang Diffusion.

In this sense, to optimize the launch time, we should have a detailed breakdown of what is actually taking time when we launch our models. Please use Qwen-Image as an example, and try to break down the time spent. Then let's see whether we shall spend our time on optimize the launching time.

Related resources

No response