Comment 17 for bug 593560

time bzr co 4.4 test1
bzr co 4.4 test1 1484,59s user 69,65s system 93% cpu 27:38,51 total

(bzr remove-tree)

time bzr co --lightweight --lsprof-file colw-nosourcewt.lsprof test1 test2
Profile data written to "colw-nosourcewt.lsprof".
bzr co --lightweight --lsprof-file colw-nosourcewt.lsprof test1 test2 172,49s user 33,52s system 76% cpu 4:28,71 total

I also did some tests on a lucid server running bzr 2.1.1 and using a regular hard disk, a faster CPU, and no ecryptfs, the results were much better (about 3 times better):
# (network)
bzr branch lp:gcc-linaro/4.4
59mn56s

# seems odd
bzr co 4.4 co
19mn24s

bzr co --lightweight 4.4 colw
1mn28s

bzr status
9s

bzr revert -r tag:gcc_4_4_4_release
1mn10s

# seems odd
bzr branch -r tag:gcc_4_4_4_release 4.4 4.4.4
19mn48s

(Memory usage was quite scary during this process, with bzr using as much as 11% of memory in top on a 8 GiB machine.)