No. No. And maybe. What developers think does not matter if you want your software to be used. Responsiveness has always been the number one UI complaint. If

No. No. And maybe. What developers think does not matter if you want your software to be used. Responsiveness has always been the number one UI complaint. If your program is sluggish, that's virtually always because it's badly designed. That's your fault, not the compiler's. Application programmers don't need to know about CPU cache size because they should have designed their programs to perform on low-end hardware.