*USER STORY:*

As a OpenShift developer, I want cluster actions to take less time so that costs and agility are improved. There is a possible efficiency gain in making AWS service invocations asynchronous and cached. 

*DESCRIPTION:*

More details in this PR
https://github.com/openshift/installer/pull/5344
 
*Required:*

Better performance without breaking compatibility for IAM User tags lookup

*Nice to have:*

Make improvements available to other AWS API Calls

*ACCEPTANCE CRITERIA:*

Keep passing tests with improved install / uninstall time

*ENGINEERING DETAILS:*

Consider asynchronous queuing, caching and client tuning to get faster results while respecting service throttling.