Resolve #325, performance optimization for add comments

[BluesJhao]

PR Details

Description

Related Issue

Motivation and Context

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-io]

Codecov Report

Merging #347 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #347      +/-   ##
=========================================
+ Coverage   98.79%   98.8%   +<.01%     
=========================================
  Files          19      19              
  Lines        4061    4092      +31     
=========================================
+ Hits         4012    4043      +31     
  Misses         29      29              
  Partials       20      20

Impacted Files	Coverage Δ
excelize.go	95.57% <100%> (+0.07%)	⬆️
file.go	90.76% <100%> (+0.93%)	⬆️
comment.go	99.55% <100%> (+0.04%)	⬆️

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