gitk memory usage

I wanted to have a quick look at the commits that had been made on a 
particular branch, and rather than use git log I thought I would try gitk.

I was rather surprised to find that after running "gitk 
<start_of_branch_tag>..<branch_head>" (which showed a grand total of 4 
commits) wish had a virtual size of ~1.1G - which on a machine with 1G 
physical RAM is not a good thing.

Does anyone know if this is to be expected from a large repository (~2.5G 
packed), or do I have a buggy version of wish installed?

-- 
Julian

  ---
Get Revenge!  Live long enough to be a problem for your children!