Walter here. No, I don&#x27;t know gcc at all.<p>The frustrating thing about many optimizations is they&#x27;ll improve some code generation and worsen others, because they all interact with each other. They&#x27;re like a pharmaceutical - sometimes they cure, but have deleterious side effects. Most of the work in an optimizer is trying to make an optimization work better most of the time and limit the downsides.