SD PromptSaver node adds an extra 12seconds to first run

[drmbt]

Description

I'm seeing a 12 second run time that isn't there for other save nodes, and that is really hurting me when using comfy with an API. It seems like the SD PromptSaver node might actually be flushing the flux model and reloading it into memory; I'm guessing that if not using the SD ParameterGenerator, this is what you're doing to get model name, which seems really inneficient. if model name could just be a string that would be ideal, or really anything that wouldn't trigger a reload

Reproduction steps

run any basic workflow using the SD PromptSaver, take a look at the inference time reported for that node on the first run from a cold boot

Image file

first run:

second run:

first run with a dummy empty model nullModel.ckpt:

[drmbt]

interestingly enough, if i convert model_name to an input and don't connect anything, this isn't a problem