Falola Olufemi Adedeji

// Memoized component to prevent unnecessary re-renders
const ExpensiveList = React.memo<{ items: Item[] }>(({ items }) => {
  // Memoize expensive filtering operation
  const filteredItems = useMemo(() => {
    return items
      .filter(item => item.active)
      .sort((a, b) => b.priority - a.priority)
      .slice(0, 100);
  }, [items]);

  return (
    <div>
      {filteredItems.map(item => (
        <ListItem key={item.id} {...item} />
      ))}
    </div>
  );
}, (prevProps, nextProps) => {
  // Custom comparison for deeper optimization
  return prevProps.items.length === nextProps.items.length &&
    prevProps.items.every((item, idx) => 
      item.id === nextProps.items[idx].id
    );
});

interface Repository<T extends { id: string }> {
  getAll(): Promise<T[]>;
  getById(id: string): Promise<T | null>;
  create(data: Omit<T, 'id'>): Promise<T>;
  update(id: string, data: Partial<T>): Promise<T>;
  delete(id: string): Promise<boolean>;
}

class BaseRepository<T extends { id: string }> 
  implements Repository<T> {
  constructor(private endpoint: string) {}

  async getAll(): Promise<T[]> {
    const response = await fetch(this.endpoint);
    return response.json();
  }

  async getById(id: string): Promise<T | null> {
    const response = await fetch(`${this.endpoint}/${id}`);
    if (!response.ok) return null;
    return response.json();
  }

  async create(data: Omit<T, 'id'>): Promise<T> {
    const response = await fetch(this.endpoint, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });
    return response.json();
  }
  
  // ... other methods
}

func ProcessTasksConcurrently(tasks []Task) []Result {
    resultChan := make(chan Result, len(tasks))
    var wg sync.WaitGroup

    // Worker pool pattern
    workerCount := runtime.NumCPU()
    taskChan := make(chan Task, len(tasks))

    // Start workers
    for i := 0; i < workerCount; i++ {
        wg.Add(1)
        go func() {
            defer wg.Done()
            for task := range taskChan {
                result := processTask(task)
                resultChan <- result
            }
        }()
    }

    // Send tasks to workers
    for _, task := range tasks {
        taskChan <- task
    }
    close(taskChan)

    // Wait and collect results
    go func() {
        wg.Wait()
        close(resultChan)
    }()

    results := make([]Result, 0, len(tasks))
    for result := range resultChan {
        results = append(results, result)
    }
    
    return results
}