No Use Memo Simple Expression

Error

small-rules/no-use-memo-simple-expression

Disallow useMemo for expressions that are already trivial to compute.

Diagnostic Messages

simpleMemo

useMemo wrapping a trivially cheap expression - memo overhead exceeds the computation

This rule does not accept options.

{
  "jsPlugins": [
    "@pobammer-ts/small-rules"
  ],
  "rules": {
    "small-rules/no-use-memo-simple-expression": "error"
  }
}

Memoized simple literal

import { useMemo } from "react";

const value = useMemo(() => 1, []);

Memoized indexed lookup

import { useMemo } from "react";

const values = [1, 2, 3];
const index = 1;

const value = useMemo(() => values[index], [index]);