perf(startup): improve rendering on nvim start

[linrongbin16]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 34.37500% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 56.40%. Comparing base (8698413) to head (dd208ab).

Files	Patch %	Lines
lua/colorbox/loader.lua	23.07%	20 Missing ⚠️
lua/colorbox.lua	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
+ Coverage   56.32%   56.40%   +0.07%     
==========================================
  Files           9       10       +1     
  Lines         474      484      +10     
==========================================
+ Hits          267      273       +6     
- Misses        207      211       +4     

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