Optimize server code

[matyhtf]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 71.16%. Comparing base (6592117) to head (1cce1a1).
Report is 6 commits behind head on master.

Files	Patch %	Lines
src/server/reactor_thread.cc	33.33%	2 Missing ⚠️
src/server/thread.cc	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5456      +/-   ##
==========================================
+ Coverage   70.55%   71.16%   +0.61%     
==========================================
  Files         107      107              
  Lines       16462    16518      +56     
  Branches     3025     3029       +4     
==========================================
+ Hits        11614    11755     +141     
+ Misses       4793     4708      -85     
  Partials       55       55              

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