Solutions – performance

Performance tuning is some of the hardest software you will do.

Always try to test your system with as much fidelity as possible. 

      And allow multiple levels of simulation.

Before you ship, measure how much spare performance you have

      Leave most of the debugging in the “test” release to slow system down.

Common fixes to performance cause other problems

Caching – uses more memory
Looping – increases latency

Do performance fixes First & Last

i.e. design for performance, code for maintainability
Debug for performance only if you must.

Its ok to remove the debugging in the final version to provide some performance margin