The core functionality that is interesting is:

Launchpad:
           1            0     13.8808      0.0002   bzrlib.push:58(_show_push_branch)
          +1            0      6.1671      0.0001   +bzrlib.branch:1400(create_clone_on_transport)
          +1            0      2.2326      0.0000   +bzrlib.transport:1563(get_transport)
          +1            0      0.2033      0.0000   +bzrlib.remote:2629(get_stacked_on_url)
          +1            0      5.2292      0.0000   +bzrlib.bzrdir:700(open_from_transport)
          +1            0      0.0450      0.0000   +bzrlib.branch:1214(get_push_location)
          +1            0      0.0035      0.0000   +bzrlib.push:46(report)
          +1            0      0.0000      0.0000   +bzrlib.push:40(__init__)
           1            0      6.1648      0.0001   bzrlib.bzrdir:153(clone_on_transport)
          +1            0      0.6122      0.0000   +bzrlib.remote:1618(fetch)
          +1            0      2.3935      0.0000   +bzrlib.bzrdir:1313(initialize_on_transport_ex)
          +1            0      3.0734      0.0000   +<<string>>:1(clone_read_locked)
          +1            0      0.0340      0.0000   +bzrlib.bzrdir:1168(open_branch)
          +1            0      0.0466      0.0000   +bzrlib.bzrdir:865(cloning_metadir)
          +1            0      0.0040      0.0000   +bzrlib.bzrdir:568(find_repository)

QAStaging:
           1            0     15.5928      0.0001   bzrlib.push:58(_show_push_branch)
          +1            0      1.8000      0.0000   +bzrlib.transport:1563(get_transport)
          +1            0      0.0650      0.0000   +bzrlib.remote:2629(get_stacked_on_url)
          +1            0     11.1057      0.0000   +bzrlib.branch:1400(create_clone_on_transport)
          +1            0      2.5834      0.0000   +bzrlib.bzrdir:700(open_from_transport)
          +1            0      0.0365      0.0000   +bzrlib.branch:1214(get_push_location)
          +1            0      0.0021      0.0000   +bzrlib.push:46(report)
          +1            0      0.0000      0.0000   +bzrlib.push:40(__init__)
           1            0     11.1040      0.0001   bzrlib.bzrdir:153(clone_on_transport)
          +1            0      6.7379      0.0000   +<<string>>:1(clone_read_locked)
          +1            0      3.4196      0.0000   +bzrlib.bzrdir:1313(initialize_on_transport_ex)
          +1            0      0.8771      0.0000   +bzrlib.remote:1618(fetch)
          +1            0      0.0294      0.0000   +bzrlib.bzrdir:1168(open_branch)
          +1            0      0.0004      0.0000   +bzrlib.decorators:234(wrapped)
          +1            0      0.0354      0.0000   +bzrlib.bzrdir:865(cloning_metadir)
          +1            0      0.0035      0.0000   +bzrlib.bzrdir:568(find_repository)

chinstrap:
           1            0      2.2664      0.0001   bzrlib.push:58(_show_push_branch)
          +1            0      0.0623      0.0000   +bzrlib.transport:1563(get_transport)
          +1            0      0.6539      0.0000   +bzrlib.branch:1400(create_clone_on_transport)
          +1            0      1.4800      0.0000   +bzrlib.bzrdir:700(open_from_transport)
          +1            0      0.0409      0.0000   +bzrlib.remote:2629(get_stacked_on_url)
          +1            0      0.0277      0.0000   +bzrlib.branch:1214(get_push_location)
          +1            0      0.0015      0.0000   +bzrlib.push:46(report)
          +1            0      0.0000      0.0000   +bzrlib.push:40(__init__)
           1            0      0.6520      0.0001   bzrlib.bzrdir:153(clone_on_transport)
          +1            0      0.0960      0.0000   +bzrlib.bzrdir:1313(initialize_on_transport_ex)
          +1            0      0.2027      0.0000   +bzrlib.remote:1618(fetch)
          +1            0      0.2767      0.0000   +<<string>>:1(clone_read_locked)
          +1            0      0.0317      0.0000   +bzrlib.bzrdir:1168(open_branch)
          +1            0      0.0400      0.0000   +bzrlib.bzrdir:865(cloning_metadir)
          +1            0      0.0042      0.0000   +bzrlib.bzrdir:568(find_repository)

'get_transport' overhead shows the cost of the XMLRPC request.