+ Default: `{ concurrency: 1 }`
+
+#### `ThreadPoolOptions extends PoolOptions`
+
+- `workerOptions` (optional) - An object with the worker options. See [worker_threads](https://nodejs.org/api/worker_threads.html#worker_threads_new_worker_filename_options) for more details.
+
+#### `ClusterPoolOptions extends PoolOptions`
+
+- `env` (optional) - An object with the environment variables to pass to the worker. See [cluster](https://nodejs.org/api/cluster.html#cluster_cluster_fork_env) for more details.
+
+- `settings` (optional) - An object with the cluster settings. See [cluster](https://nodejs.org/api/cluster.html#cluster_cluster_settings) for more details.
+
+### `pool = new FixedThreadPool/FixedClusterPool(numberOfThreads/numberOfWorkers, filePath, opts)`
+
+`numberOfThreads/numberOfWorkers` (mandatory) Number of workers for this pool
+`filePath` (mandatory) Path to a file with a worker implementation
+`opts` (optional) An object with the pool options properties described above