The most important thing for performance is to get the architecture right. You can do micro-optimizations any time but architecture is forever, you typically ca

The most important thing for performance is to get the architecture right. You can do micro-optimizations any time but architecture is forever, you typically can't fix that after you've shipped it. Almost all performance in modern systems is architectural in nature. Architecture doesn't live in 3% of your code, it lives in most of it.