update readme

Author: d-biehl

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to the "robotcode" extension will be documented in this file
 
 ## [Unreleased]
 
+- update readme
+
 ##  0.2.5
 
 ### added

README.md

@@ -27,3 +27,16 @@ Extensions installed through the marketplace are subject to the [Marketplace Ter
 ## Setting up your environment
 
 TODO
+
+### Speedup things
+
+RobotCode contains everything you need to work with the robot framework in VSCode, but only in a platform-independent version.
+To speedup things you can install the platform dependent versions of the following libraries in your python environment. If you use pipenv or poetry you should install it as dev dependencies.
+
+- pydantic
+    - will install the cython compiled packages
+- orjson 
+    - a faster Python JSON library
+
+
+