Advice on optimizing custom URL validator for internal links in Sanity Studio

Custom validator at linkGroups[_key=="721a4739faa3"].links[_key=="e61f9228310a"].linkUrl has taken more than 5000ms to respond

import client from "part:@sanity/base/client";

const listAllSlugs = async () => {
  const slugsList = await client
    .withConfig({ apiVersion: "2021-10-21" })
    // require slug and exclude unpublished drafts
    .fetch(
      `*[defined(slug.current) && !(_id in path("drafts.**"))][].slug.current`
    );

  return slugsList;
};

export const validateLink = (url) => {
 
  // if it's an internal link
  if (url.startsWith("/")) {
    // remove # and ?
    const clean = url.split("#")[0].split("?")[0];

    return listAllSlugs().then((allSlugs) => {
      return allSlugs.includes(clean)
        ? true
        : "Does not match any published slugs";
    });
  }
  // ... test against http url patterns ...
};

export const validateLink = (cachedSlugs) => (url) => {
  // cachedSlugs is declared in the document schema that calls validateLink
  
  // ...

  // if it's an internal link
  if (url.startsWith("/")) {
    const cleanUrl = url.split("#")[0].split("?")[0];

    if (cachedSlugs) {
      // use the cache if it exists
      return cachedSlugs.includes(cleanUrl)
        ? true
        : "Does not match any published slugs";
    } else {
      return listAllSlugs().then((allSlugs) => {
        // cache results
        cachedSlugs = allSlugs;

        return allSlugs.includes(cleanUrl)
          ? true
          : "Does not match any published slugs";
      });
    }
  }
  // ...
};

import _ from "lodash";

const getAllSlugs = _.memoize(async (docId) => {
  const allSlugs = await client
    .withConfig({ apiVersion: "2021-10-21" })
    .fetch(
      `*[defined(slug.current) && !(_id in path("drafts.**"))][].slug.current`
    )
    .then((r) => {
      return r;
    });

  return allSlugs;
});

export const validateLink = (url, { document }) => {
  return getAllSlugs(document._id).then((allSlugs) => {
    const cleanUrl = url.split("#")[0].split("?")[0];

    return allSlugs.includes(cleanUrl)
      ? true
      : "Does not match any published slugs";
  });
};