Comment 12 for bug 1295732

To reproduce my timings:
$ cat my-rc
export TRIPLEO_ROOT="/home/robertc/work" # I like my sources visible not hidden somewhere
export DIB_COMMON_ELEMENTS='stackuser apt-sources use-ephemeral pypi -u --offline' # -u to avoid compression, offline to avoid network hits
export DIB_APT_SOURCES=sources.list # points at my local ubuntu mirror
export PYPI_MIRROR_URL=http://mirror.robertcollins.net/pypi/simple # my local pypi mirror
export DIB_NO_PYPI_PIP=1 # no pypi.python.org roundtrips
export PYPI_MIRROR_URL_1=http://mirror.robertcollins.net/pypi-mirror/Ubuntu-13.10 # local wheel mirror
export NODE_ARCH=amd64 # same arch as my machine, so the wheels in the mirror work :)

I don't have an http_proxy setup in this environment.