I will say, I don't think I've ever faced a performance issue that was caused by poor architecture. Maybe I've been exceedingly lucky. But pretty much all of th

I will say, I don't think I've ever faced a performance issue that was caused by poor architecture. Maybe I've been exceedingly lucky. But pretty much all of the performance issues I've encountered that I can remember are in individual queries or functions / methods (or sometimes, a group of functions / methods); discrete units of code that could be tested, changed, and fixed without any sort of re-architecture or major rewrite. Or maybe we're using different definitions of "architecture" here.