Fix prod tests, add benchmark.
Fix prod tests, add benchmark.

TBR=iannucci@chromium.org
BUG=None
TEST=None

Review-Url: https://codereview.chromium.org/2351613002

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go