Goal: 

Goal based statement, with context. Can take the form of “As a <User/Actor>, I Want <to Achieve Some Goal>, so that <Some Reason/Context>”.

• Add tests for sampler and verify correctness of existing implementation
• Refactor and simplify implementation of sampling code
• Compare performance of new version and ensure it is equivalent or better than existing implementation

Acceptance Criteria:

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

• New implementation passes tests and performs similar or better on benchmarks
• New implementation is easier to understand and modify