I'm not sure how you can expect an answer or even meaningful discussion when you don't specify any parameters on what anything you're asking about means. What

I'm not sure how you can expect an answer or even meaningful discussion when you don't specify any parameters on what anything you're asking about means. What does "good" mean? What does "productivity" "speed" and "performance" mean? If you're talking about building an operating system from scratch, probably not. If you're talking about building a hobby website for existing PHP developers, maybe?