The issue was with the model versioning compatibility change and someone inserting his initials in the magic number. The optimizations worked great for me on Linux, the first tiem your run the CLI program you have to wait a lot of time, more then 1 minute for a 20Gb model , but the next runs are instant. Maybe some Windows guys are salty that this does not work as great on their OS , if that is the case they should update it to get the performance boost. This are not soem nanoseconds you gain but actual minutes for each run.