This article[1] has IBM slides which suggest 40-50x computation penalty and 10-20x RAM penalty.
[1]: https://arstechnica.com/gadgets/2020/07/ibm-completes-succes...
[1]: https://arstechnica.com/gadgets/2020/07/ibm-completes-succes...
We put up a cryptography playlist during the last week on youtube since it felt like people didn't have enough resources to refer to easily. We hope it helps! It includes the video walkthrough of how to get the toolkit running and run some demos.