By rewriting the script to use git fast-import instead, it's now chugging along nicely at ~12.5 commits/s (ie ~47 minutes).
Two months and lots of changes later...
Currently a full export of ulpc and Pike takes ~1 hour, and contains ~34000 commits.
An almost useable export of Pike is now available from
[...]
A new export is available from git://pike-git.lysator.liu.se/pike-full-20100101
New since the previous export is that I've found and incorporated another historic ulpc repository (ulpc.hubbe), which means that most of the early history of Pike has been recovered.
I believe that I've identified most of the renamed files and when they were renamed, so the commit graph should make more sense now.
Another issue is that all commits are currently credited to the committer (ie not necessarily the author). I'll try to extract the information from git://pike-git.lysator.liu.se/pike.git.
The above is still on the todo.
Feed-back appreciated.
Please, I received next to none for the previous repository.
Happy New Year!
/grubba