What are the best practices for assessing performance efficiency of a software product? - Software Quality Control

What are the best practices for assessing performance efficiency of a software product?

- Practices of implementing Application Architecture.

- Interactions with remote resources should be appropriate.

- Proper management of memory, network and disk space.

- Best coding practices.

- Proper and appropriate data access performance and management.

- Appropriate compliance with Object Oriented and Structured Programming practices.
- Appropriate compliance with SQL Programming best practices.