Instrument core structs with gtrace for easy debug

[gobwas]

No description provided.

[cristaloleg]

What about overhead? Regarding dependencies, allocations, cpu time. I think there is no right answer at the moment, but what are your expectations?

[gobwas]

I believe there will be no overhead if you don't use it -- there is an option of the gtrace to generate tracing code only if some build tag was given. So it will overhead for sure only if you pass that build tag.