db.sbe_perf_latest.aggregate([{ $match: { tags: {$ne: "ignore"}, test: "snapshot_reads_with_currentOp" } }, {$project: {signed_percent_change_stable: 1, test: 1, args: 1, _id: 0, measurement: 1}}]).pretty()
[
  {
    args: { thread_level: 32 },
    measurement: 'ops_per_sec',
    signed_percent_change_stable: -12.6343820837036,
    test: 'snapshot_reads_with_currentOp'
  },
  {
    args: { thread_level: 1 },
    measurement: 'ops_per_sec',
    signed_percent_change_stable: -4.802311748749716,
    test: 'snapshot_reads_with_currentOp'
  },
  {
    args: { thread_level: 64 },
    measurement: 'ops_per_sec',
    signed_percent_change_stable: 0.08377862328757146,
    test: 'snapshot_reads_with_currentOp'
  }
]