I am currently working on performance tuning & refactoring a product. And, interestingly I found some Agile/Lean principles that apply for performance tuning and refactoring:
- Most Lean principles appear counter-intuitive at first
- Aim for system optimization instead of point optimization
- Build prototype and measure (run quick experiments), not just theorize
- Minimize the number and size of things-in-process
- The most predictable performance comes from maintaining options until you have the most information
