# Node Pool :arrow_double_up: :on:
Node pool contains two <a href="https://nodejs.org/api/worker_threads.html#worker_threads_worker_threads">worker-threads </a> pool implementations. <br>
The first implementation is a static thread pool , with a defined number of threads that are started at creation time .<br>
The second implementation is a dynamic thread pool with a number of threads started at creation time and other threads created when the load will increase ( with an upper limit ) <br>