function getRouteStringFromRoutes(routes) {
  if (!Array.isArray(routes) || routes.length === 0) {
    return '';
  }

  const routesWithPaths = routes.filter((route) => !!route.path);

  let index = -1;
  for (let x = routesWithPaths.length - 1; x >= 0; x--) {
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    const route = routesWithPaths[x];
    if (route.path?.startsWith('/')) {
      index = x;
      break;
    }
  }

  const pathParts = routesWithPaths
    .slice(index)
    .filter(({ path }) => !!path)
    .map(({ path }) => path);

  // Join all parts with '/', then replace multiple slashes with a single one.
  let fullPath = pathParts.join('/');
  fullPath = fullPath.replace(/\/+/g, '/');

  // Edge case: If the path started with multiple slashes and routes,
  // like `//foo`, it might become `/foo`. This is generally acceptable.

  return fullPath;
}

const routes = Array.from({ length: 100 }).map((_, i) => 'aaaa' + i);
console.log(getRouteStringFromRoutes(routes));

function getRouteStringFromRoutes(routes) {
  if (!Array.isArray(routes) || routes.length === 0) {
    return '';
  }

  const routesWithPaths = routes.filter((route) => !!route.path);

  let index = -1;
  for (let x = routesWithPaths.length - 1; x >= 0; x--) {
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    const route = routesWithPaths[x];
    if (route.path?.startsWith('/')) {
      index = x;
      break;
    }
  }

  return routesWithPaths.slice(index).reduce((acc, { path }) => {
    const pathSegment = acc === '/' || acc === '' ? path : `/${path}`;
    return `${acc}${pathSegment}`;
  }, '');
}

const routes = Array.from({ length: 100 }).map((_, i) => 'aaaa' + i);
console.log(getRouteStringFromRoutes(routes));