remove unnecessary allocation and clone

[laizy]

Description

minor optimizations during code review.

Checklist

• [ ] I have run cargo make pr-flow
• [ ] I have reviewed my own code
• [ ] I have added tests

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Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)

✅ None of the examples has changed their size significantly.

[voidpumpkin]

Seems this PR got forgotten in time. I recon A separate PR can be made if we still need this.