Impl: reduce syscall and memcopy for multiple package

[watermelo]

origin issue AlexStocks#33

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[codecov-io]

Codecov Report

Merging #36 into master will increase coverage by 0.61%.
The diff coverage is 90.90%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   69.61%   70.22%   +0.61%     
==========================================
  Files           7        7              
  Lines        1415     1404      -11     
==========================================
+ Hits          985      986       +1     
+ Misses        336      328       -8     
+ Partials       94       90       -4     

Impacted Files	Coverage Δ
session.go	65.48% <83.33%> (+0.73%)	⬆️
connection.go	79.53% <93.75%> (+0.96%)	⬆️

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[gaoxinge]

LGTM

[wongoo]

net.Buffers() is a great implement

[fangyincheng]

delete unuseful line ？

[gaoxinge]

@watermelo Can WriteBytes and WriteBytesArray in session.go be unified to one function? They look very similar.

[AlexStocks]

@watermelo Can WriteBytes and WriteBytesArray in session.go be unified to one function? They look very similar.

直接中文回复你吧。从功能上讲，你的理解当然是对的，但是基于这两个函数都是 public 的，所以基于最小改动原则，个人建议不合并。

[gaoxinge]

@AlexStocks @watermelo 嗯，是的。还有一个小小的问题，就是session.go里面的incWritePkgNum()

https://github.com/dubbogo/getty/blob/8b02420a4bc8f7928b22ccf6fb1caaecab5b2e8e/session.go#L431-L439

是不是需要放到下面的用connection.go里面？

https://github.com/dubbogo/getty/blob/8b02420a4bc8f7928b22ccf6fb1caaecab5b2e8e/connection.go#L292-L299

这样看起来是不是统一点？

[watermelo]

@AlexStocks @watermelo 嗯，是的。还有一个小小的问题，就是session.go里面的incWritePkgNum()

https://github.com/dubbogo/getty/blob/8b02420a4bc8f7928b22ccf6fb1caaecab5b2e8e/session.go#L431-L439

是不是需要放到下面的用connection.go里面？

https://github.com/dubbogo/getty/blob/8b02420a4bc8f7928b22ccf6fb1caaecab5b2e8e/connection.go#L292-L299

这样看起来是不是统一点？

@gaoxinge done

[gaoxinge]

@watermelo Great job! LGTM.

[fangyincheng]

LGTM