Look for bias in C++ perf test

[LarryOsterman]

Pull Request Checklist

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See the detailed list in the contributing guide.

• C++ Guidelines
• Doxygen docs
• Unit tests
• No unwanted commits/changes
• Descriptive title/description
  • PR is single purpose
  • Related issue listed
• Comments in source
• No typos
• Update changelog
• Not work-in-progress
• External references or docs updated
• Self review of PR done
• Any breaking changes?

[github-actions]

Hi @LarryOsterman. Thank you for your interest in helping to improve the Azure SDK experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment. Otherwise, we'll close this out in 7 days.