Entering backtrace buffer if displayed information is huge

[Wolfgang Pausch]

Hello,

I'm implementing some lisp code based on js2-mode.  The nodes of the 
abstract syntax tree of that mode frequently need to be passed between 
defuns.

My problem is that the Backtrace buffer tries to display the huge 
contents of that nodes, and this makes entering the Backtrace buffer 
extremely slow, and sometimes impossible at all.

(and once opened, each editor move within the Backtrace buffer can cause 
emacs to freeze for an additional time)

What's a senseful way to debug in such situations?  Basically, if the 
contents of the variables passed to a defun are too huge to be displayed 
in a efficient manner, at least the names of the functions being called 
would be a help while debugging --- is it somehow possible to restrict 
opening a Backtrace buffer to such more basic information?

Currently, I have the situation that debugging trivial programming 
problems costs way too much time...

Thanks for all hints,

Wolfgang