Fibonacci With Pool And Timeout

Problem

Expensive recursive computation needs a latency limit.

Solution

Put recursion in worker module and configure task timeout.

// fib.worker.ts
import { exposeTask } from '@vielzeug/familiar/protocol';

function fib(value: number): number {
  return value <= 1 ? value : fib(value - 1) + fib(value - 2);
}

exposeTask(fib);

import { createWorker } from '@vielzeug/familiar';

const pool = createWorker<number, number>(new URL('./fib.worker.ts', import.meta.url), { concurrency: 4, timeout: 5_000 });

try {
  const result = await pool.run(35);
  console.log(result);
} finally {
  pool.dispose();
}

Pitfalls

• Timeout terminates worker slot and rejects with FamiliarTimeoutError.
• Set deadline from expected input limits.

Related

• Typed Error Handling