Perf improvement: use array instead of set for queue

[divdavem]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.73%. Comparing base (673ebcd) to head (117c196).

Files with missing lines	Patch %	Lines
src/index.ts	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #137      +/-   ##
==========================================
+ Coverage   98.65%   99.73%   +1.07%     
==========================================
  Files           1        1              
  Lines         372      375       +3     
  Branches       67       69       +2     
==========================================
+ Hits          367      374       +7     
- Misses          0        1       +1     
+ Partials        5        0       -5     

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