No I hadn't, I had looked at Amazon's Firecracker (used for Lambda) and some of the early work Shopify has been doing to run untrusted code by using web assembly.[2]

Thank you for the tip on Piston!

  [1] https://aws.amazon.com/blogs/aws/firecracker-lightweight-virtualization-for-serverless-computing/
  [2] https://shopify.engineering/shopify-webassembly