db.sbe_perf_latest.aggregate([{ $match: {tags: "server72743"}}, {$project: {_id: 0, classification: 1, test: 1, signed_percent_change_stable: 1, signed_z_score_change_stable: 1}}])
[
  {
    classification: 'regression critical',
    signed_percent_change_stable: -12.81523020255851,
    signed_z_score_change_stable: -2.0757653225491617,
    test: 'find_project-useAgg'
  },
  {
    classification: 'regression important',
    signed_percent_change_stable: -11.522796601876351,
    signed_z_score_change_stable: -1.6296664989703145,
    test: 'find_project_6_sort_indexed_skip_limit_1-useAgg'
  },
  {
    classification: 'regression important',
    signed_percent_change_stable: -11.594318398673238,
    signed_z_score_change_stable: -1.590269825761292,
    test: 'find-useAgg'
  },
  {
    classification: 'regression important',
    signed_percent_change_stable: -11.243317088064842,
    signed_z_score_change_stable: -1.4858993740495674,
    test: 'find_project_6_sort_unindexed_skip_limit_1-useAgg'
  }
]