auto tp = yaclib::MakeThreadPool(/*threads=CPU Cores*/);
auto strand = yaclib::MakeStrand(tp);
LRUCache<K, SharedFuture<V>> global_cache;

for (auto user : users) {
  auto future = yaclib::Run(tp, [&] -> K {
    return GetRequest(user);
  });
  shared_future = future.Then(strand, [&] (K key) {
    if (global_cache.has(key)) {
      return global_cache[key];
    }
    return global_cache[key] = yaclib::Split(yaclib::Run(tp, [] (K key) {
      return ComputeValue(key);
    }));
  });
  shared_future.Then(tp, [&] (const V& val) { MakeResponse(user, val); });
}