Proof

// compiling
async setState(id: string, state: any): Promise<void> {
    const previousState = cache.get('id') || {};
    const newState = { ...previousState, ...state };

    if (isEqual(newState, previousState)) {
      return;
    }

    await redis.hset(STATE_KEY, id, JSON.stringify(newState));
    cache.set(id, newState);
}

// not compiling
async setState(id: string, state: any): Promise<void> {
    const previousState = cache.get(id) || {};
    const newState = { ...previousState, ...state };

    if (!isEqual(previousState, newState)) {
      await redis.hset(STATE_KEY, id, JSON.stringify(newState));
      cache.set(id, newState);
    }
  }