Enhance documentation about GC usage

[Roshyo]

No description provided.

[codecov]

Codecov Report

Merging #213 (692e743) into 0.12.x (dbff8f1) will not change coverage.
The diff coverage is n/a.

❗ Current head 692e743 differs from pull request most recent head 846346f. Consider uploading reports for the commit 846346f to get more accurate results

@@            Coverage Diff            @@
##             0.12.x     #213   +/-   ##
=========================================
  Coverage     49.73%   49.73%           
  Complexity      528      528           
=========================================
  Files           102      102           
  Lines          1687     1687           
=========================================
  Hits            839      839           
  Misses          848      848           

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