Optimization with StringBuilder #1170

[MingJunDuan]

Motivation:

A small optimization.
StringBuilder is better than StringBuffer in thread-safety context.

Modification:

Replace StringBuffer with StringBuilder

Result:

Fixes #.

If there is no issue then describe the changes introduced by this PR.

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[codecov]

Codecov Report

Merging #1173 (5302683) into master (0b026af) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1173      +/-   ##
============================================
+ Coverage     71.09%   71.13%   +0.03%     
- Complexity      825      826       +1     
============================================
  Files           407      407              
  Lines         17199    17199              
  Branches       2681     2681              
============================================
+ Hits          12228    12234       +6     
+ Misses         3595     3588       -7     
- Partials       1376     1377       +1     

Impacted Files	Coverage Δ
...ay/sofa/rpc/protocol/telnet/HelpTelnetHandler.java	82.35% <100.00%> (ø)
...ansport/bolt/ReuseBoltClientConnectionManager.java	65.21% <0.00%> (-2.90%)	⬇️
...ay/sofa/rpc/client/AllConnectConnectionHolder.java	60.51% <0.00%> (-0.26%)	⬇️
...om/alipay/sofa/rpc/server/triple/TripleServer.java	75.00% <0.00%> (+1.11%)	⬆️
...java/com/alipay/sofa/rpc/module/LookoutModule.java	85.71% <0.00%> (+33.33%)	⬆️

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[MingJunDuan]

Can't open "Individual Contributor License Agreement" page after I click the "Sign Individual CLA" button.

[MingJunDuan]

Can't open "Individual Contributor License Agreement" page after I click the "Sign Individual CLA" button.

I have signed the "Individual Contributor License Agreement".

[nobodyiam]

LGTM