perf: avoid extra call stat for file

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

Avoid extra call stat for file

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #365 into master will increase coverage by 0.07%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #365      +/-   ##
==========================================
+ Coverage   94.75%   94.82%   +0.07%     
==========================================
  Files           9        9              
  Lines         286      290       +4     
  Branches       75       78       +3     
==========================================
+ Hits          271      275       +4     
  Misses         14       14              
  Partials        1        1

Impacted Files	Coverage Δ
src/postProcessPattern.js	89.61% <100%> (+0.42%)	⬆️
src/preProcessPattern.js	97.59% <100%> (+0.02%)	⬆️

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