@studnicky/v8/arguments-object

Disallows every use of arguments and requires rest parameters. Reading arguments.length or an indexed element locally measures the same as rest parameters in Node v24; the costly case is allowing arguments to escape its frame, such as by assigning, passing, spreading, returning, or storing it. At 5,000,000 calls, an escaped arguments object measures 7.5× slower than rest parameters. The rule keeps one uniform remedy because rest parameters are never worse and reliably distinguishing every escaping use requires control-flow analysis.

Fixable: No · Options: No · Suggested severity: error

✗ Incorrect

function first(): unknown {
  return arguments[0];
}

let saved: IArguments | undefined;
function save(): void {
  saved = arguments;
}

✓ Correct

function first(...values: unknown[]): unknown {
  return values[0];
}

let saved: readonly unknown[] | undefined;
function save(...values: unknown[]): void {
  saved = values;
}