Complexity for new features or performance optimizations is simply a trade off. Sometimes one worth making. By adding a lot more complex code can I make this

Complexity for new features or performance optimizations is simply a trade off. Sometimes one worth making. By adding a lot more complex code can I make this blitter 100 times faster? By using this more complex algorithm can I make a "simple" string search amazingly faster? As for features: Word has more features than Notepad. So why doesn't everyone use notepad?