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   <a href="#license">License</a>
 </h3>
 
+<h2> Overview </h2>
 Node pool contains two <a href="https://nodejs.org/api/worker_threads.html#worker_threads_worker_threads">worker-threads </a> pool implementations , you don' t have to deal with worker-threads complexity. <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 ), the new created threads will be stopped after a threshold. <br>