Converting Perforce to Mercurial repositories is fast (4-5 seconds for a 500MB repository with 300 revisions).
You'll also want to start p4d and log into P4V before, so it caches credentials.
1. Setup your p4 client:
2. Enable hg converter by adding to ~/.hgrc
3. Start p4d
4. Convert the depot:
You need to specify a revision. Look it up in the p4 client (depot-details-revision). @all might also work.
hg convert //depot/...@307 converted-perforce path/to/hg-repo
5. Look at the history
6. Look at diffs and history with a graphical tool. This should give you a better idea of branches and such.
7. Clone your repository
hg clone /path/to/hg-repo
8. Publish your repository via the web interface
9. Browse around
Keep an eye on: