Note: If you are running CircleCI Server, you will need version 4.4.3 of server to take advantage of these runner features.
Container Runner
- Reduce long term memory footprint of Container Runner
 - Retry tasks where the pod has failed to start due to pod startup errors
 - Improve Container Runner monitoring mechanisms for active task pods
 - Use the home SSH directory for checkout keys instead of a temporary directory
 
Machine Runner
- Optionally use the user’s home SSH directory for checkout keys instead of a temporary directory