optimize unnecessary copy #1235

Job	Run time
Generating protobuf	13s
Make RTC sdist	12s
Build RTC wheels (x86_64)	53s
Build RTC wheels (x86_64 arm64)	1m 9s
Build RTC wheels (AMD64)	1m 28s
Build RTC wheels (aarch64)	1m 14s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	32s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	38s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	42s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	54s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	56s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	35s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	46s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 18s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 45s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	29s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	31s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	27s
Publish RTC release	0s
docs	0s
	14m 42s

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