refactor worker buffer

[matyhtf]

No description provided.

[codecov]

Codecov Report

Merging #4163 (8202e91) into master (6e446f6) will decrease coverage by 0.02%.
The diff coverage is 37.03%.

@@            Coverage Diff             @@
##           master    #4163      +/-   ##
==========================================
- Coverage   48.80%   48.77%   -0.03%     
==========================================
  Files          71       71              
  Lines       14282    14252      -30     
==========================================
- Hits         6970     6952      -18     
+ Misses       7312     7300      -12     

Impacted Files	Coverage Δ
src/server/process.cc	53.47% <25.00%> (-0.27%)	⬇️
src/server/worker.cc	48.67% <30.00%> (-0.79%)	⬇️
src/server/master.cc	53.91% <100.00%> (+0.31%)	⬆️
src/server/port.cc	50.00% <0.00%> (-0.28%)	⬇️
src/protocol/base.cc	63.15% <0.00%> (ø)

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