[#221][WIP] Performance benchmarks

[lbialy]

Built initial JMH harness to measure performance of various chimney components.

[codecov[bot]]

Codecov Report

Base: 99.70% // Head: 99.70% // No change to project coverage :thumbsup:

Coverage data is based on head (38fbf66) compared to base (c92772f). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #226   +/-   ##
=======================================
  Coverage   99.70%   99.70%           
=======================================
  Files          26       26           
  Lines         672      672           
  Branches       58       58           
=======================================
  Hits          670      670           
  Misses          2        2           

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