use pktconn

[simonlingoogle]

pktconn outperforms the existing PacketConnection implementation in GoWorld in both throughput and latency and is better tested.

Networking latency reduced from ~100ms to ~20ms while using pktconn:

• Using pktconn

  ===============================================================================
  > DoEnterRandomSpace               *12 AVG 31.679474ms RANGE 36.578197ms ~ 39.285657ms
  > DoSayInWorldChannel              *6 AVG 18.169696ms RANGE 16.115951ms ~ 22.609393ms
  > DoSayInProfChannel               *2 AVG 18.730558ms RANGE 18.204597ms ~ 19.25652ms
  > DoTestComplexAttr                *7 AVG 15.939933ms RANGE 17.665885ms ~ 19.198419ms
  > DoTestCallAll                    *5 AVG 30.375302ms RANGE 27.741105ms ~ 38.140432ms
  > DoTestAOI                        *6 AVG 13.880952ms RANGE 13.166287ms ~ 16.352856ms
  > DoTestListField                  *8 AVG 15.465175ms RANGE 14.520017ms ~ 21.657073ms
  > DoEnterRandomNilSpace            *5 AVG 19.588687ms RANGE 11.402049ms ~ 24.656038ms
  ===============================================================================

• Original:

  ===============================================================================
  > DoTestCallAll                    *4 AVG 195.988074ms RANGE 194.515821ms ~ 197.869241ms
  > DoTestAOI                        *5 AVG 94.045686ms RANGE 90.103806ms ~ 101.137198ms
  > DoTestListField                  *9 AVG 93.991133ms RANGE 90.080405ms ~ 99.492241ms
  > DoTestComplexAttr                *8 AVG 97.600485ms RANGE 92.912506ms ~ 113.727948ms
  > DoEnterRandomNilSpace            *9 AVG 106.968017ms RANGE 90.091706ms ~ 126.201891ms
  > DoSayInProfChannel               *3 AVG 88.898896ms RANGE 90.202709ms ~ 90.584523ms
  > DoEnterRandomSpace               *19 AVG 113.986718ms RANGE 119.16004ms ~ 130.237434ms
  > DoSayInWorldChannel              *6 AVG 89.768127ms RANGE 89.412981ms ~ 94.405859ms
  ===============================================================================

[codecov[bot]]

Codecov Report

Merging #89 into master will decrease coverage by 1.70%. The diff coverage is 4.65%.

@@            Coverage Diff             @@
##           master      #89      +/-   ##
==========================================
- Coverage   34.22%   32.51%   -1.71%     
==========================================
  Files          41       37       -4     
  Lines        3708     3220     -488     
==========================================
- Hits         1269     1047     -222     
+ Misses       2277     2051     -226     
+ Partials      162      122      -40     

Impacted Files	Coverage Δ
engine/entity/Space.go	0.00% <ø> (ø)
engine/kvdb/kvdb.go	36.08% <ø> (+1.76%)	:arrow_up:
engine/netutil/Connection.go	0.00% <0.00%> (-100.00%)	:arrow_down:
engine/netutil/MessagePackMsgPacker.go	81.81% <ø> (ø)
engine/netutil/Packet.go	0.00% <0.00%> (-22.57%)	:arrow_down:
engine/netutil/PacketConnection.go	0.00% <0.00%> (-51.12%)	:arrow_down:
engine/netutil/netutil.go	0.00% <ø> (ø)
engine/config/read_config.go	69.36% <100.00%> (+5.80%)	:arrow_up:
engine/netutil/TCPServer.go	24.00% <0.00%> (-8.00%)	:arrow_down:
... and 2 more

---

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[xiaonanln]

Thanks, @simonlingoogle