Aggregation is slow

Working with Data
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12 
# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: /var/lib/mongodb
  journal:
    enabled: true
#  engine:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/mongod.log

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1


# how the process runs
processManagement:
  timeZoneInfo: /usr/share/zoneinfo

security:
  authorization: "enabled"
  keyFile: /home/serverOne/Documents/AuthFile/key

#operationProfiling:

replication:
   replSetName: "rs0"

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp: