fix: perf

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

refactor code

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #300 into master will decrease coverage by 0.05%.
The diff coverage is 87.50%.

@@            Coverage Diff             @@
##           master     #300      +/-   ##
==========================================
- Coverage   98.05%   98.00%   -0.06%     
==========================================
  Files           7        7              
  Lines         411      400      -11     
  Branches      110      106       -4     
==========================================
- Hits          403      392      -11     
  Misses          8        8              

Impacted Files	Coverage Δ
src/plugins/source-plugin.js	96.42% <71.42%> (ø)
src/index.js	100.00% <100.00%> (ø)
src/plugins/minimizer-plugin.js	100.00% <100.00%> (ø)

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