I think as many developers have been waiting for dtrace on Linux, which imho is a lot nicer. It is mostly a question of what you're used to. To some extent the

I think as many developers have been waiting for dtrace on Linux, which imho is a lot nicer. It is mostly a question of what you're used to. To some extent the raw dtrace interface is a lot more powerful than Instruments though, so unfortunately you have to learn it before you can take advantage of most of the power of dtrace.