For cluster and thread pools, you can now only send and receive serializable `JSON` data.
_This is not a limitation by poolifier but NodeJS._
-#### Internal (protected) methods renaming
+#### Public properties renaming
-Those methods are not intended to be used from final users
+- Thread Pool's `numWorkers` is now `numberOfWorkers`
+- Thread Pool's `nextWorker` is now `nextWorkerIndex`
+
+#### Internal (protected) properties and methods renaming
+
+These properties are not intended for end users
+
+- `id` => `nextMessageId`
+
+These methods are not intended for end users
- `_chooseWorker` => `chooseWorker`
-- `_newWorker` => `newWorker`
+- `_newWorker` => `createWorker`
- `_execute` => `internalExecute`
- `_chooseWorker` => `chooseWorker`
- `_checkAlive` => `checkAlive`