I'd say without measuring first you have too much to look through for anything large enough to be interesting. So measure, drill in, eliminate some first obviou

I'd say without measuring first you have too much to look through for anything large enough to be interesting. So measure, drill in, eliminate some first obvious culprits, measure again, then look at assembly. I'm mentioning obvious because sometimes it really is, like doing a linear search in a hotspot where it should be a binary tree and things like that.