MongoDB图查询性能测试

db.employees.insert({ "name" : "Dev"})
db.employees.insert({ "name" : "Ron", "reportsTo" : "Eliot" })
db.employees.insert({ "name" : "Andrew", "reportsTo" : "Eliot"})
db.employees.insert({"name" : "Asya", "reportsTo" : "Ron"})
db.employees.insert({"name" : "Dan", "reportsTo" : "Andrew" })

db.employees.aggregate( [
   {
      $graphLookup: {
         from: "employees",
         startWith: "$reportsTo",
         connectFromField: "reportsTo",
         connectToField: "name",
         as: "reportingHierarchy"
      }
   }
] )