Describe the bug

In commit 43afc44, the return value of the useList hook was changed. Specifically, result.data now defaults to a new empty array ([]) if queryResponse.data.data is falsy.

// From: https://github.com/refinedev/refine/blob/acb1e96b0d6cfddbd6115818b8f01c73d56934ff/packages/core/src/hooks/data/useList.ts#L318

return {
  // ...
  result: {
    data: queryResponse?.data?.data || [],
    total: queryResponse?.data?.total,
  },
  // ...
};

While this change ensures that result.data is always an array, it introduces a significant side-effect: on every render cycle before the data is fetched, a new instance of an empty array is returned.

This breaks memoization with hooks like useMemo and useEffect because their dependency arrays rely on referential equality. Since [] === [] is always false, any memoized calculation that depends on result.data will be re-executed on every render, leading to potential performance issues.

Example:

const { data } = useList(...);

// This memoized value will be re-calculated on every render
// as long as `data` is the default empty array.
const memoizedData = useMemo(() => {
   // someComplexCompute(data)
   console.log("This will run on every render until data is loaded.");
   return someComplexCompute(data);
}, [data]);

Steps To Reproduce

ses above

Expected behavior

ses above

Packages

• @refinedev/core

Additional Context

No response