perf(anchor): reduce unnecessary calculations

[Simon-He95]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

---

🚀 Summary

copilot:summary

🔍 Walkthrough

copilot:walkthrough

[github-actions]

[github-actions]

• 🚨 Please fill changelog in the PR

  • Write with a developer-oriented perspective and narrative method, without describing the details of the repair
  • Describing the problem and the impact on the developer
  • describing the user-first site problem, not your solution
  • Refer: https://ant.design/changelog#501

• 🚨 请填写 PR 中的 changelog

  • 请用面向开发者的角度和叙述方式撰写，不描述修复细节
  • 描述问题和对开发者的影响
  • 描述用户第一现场的问题，而非你的解决方式
  • 参考：https://ant.design/changelog-cn#501

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (40a1e5e) 100.00% compared to head (2784e28) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #42018   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          616       616           
  Lines        10532     10532           
  Branches      2884      2884           
=========================================
  Hits         10532     10532           

Impacted Files	Coverage Δ
components/anchor/Anchor.tsx	100.00% <100.00%> (ø)

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