calculate dictionary for sampler names only once

samplers = []

samplers_for_img2img = []

samplers_map = {}

def create_sampler(name, model):

    samplers = [x for x in all_samplers if x.name not in hidden]

    samplers_for_img2img = [x for x in all_samplers if x.name not in hidden_img2img]

    samplers_map.clear()

    for sampler in all_samplers:

        samplers_map[sampler.name.lower()] = sampler.name

        for alias in sampler.aliases:

            samplers_map[alias.lower()] = sampler.name

set_samplers()

    p.prompt = prompt_tmp + p.prompt

def build_samplers_dict():

    samplers_dict = {}

    for sampler in sd_samplers.all_samplers:

        samplers_dict[sampler.name.lower()] = sampler.name

        for alias in sampler.aliases:

            samplers_dict[alias.lower()] = sampler.name

    return samplers_dict

def apply_sampler(p, x, xs):

    sampler_name = build_samplers_dict().get(x.lower(), None)

    sampler_name = sd_samplers.samplers_map.get(x.lower(), None)

    if sampler_name is None:

        raise RuntimeError(f"Unknown sampler: {x}")

def confirm_samplers(p, xs):

    samplers_dict = build_samplers_dict()

    for x in xs:

        if x.lower() not in samplers_dict:

        if x.lower() not in sd_samplers.samplers_map:

            raise RuntimeError(f"Unknown sampler: {x}")