slight optimization for the USB transport

[danielhrisca]

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] I have read the CONTRIBUTING document.
• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

from array import array
buffer = array("B", bytes(16384))
buffer_view = memoryview(buffer)
%timeit buffer.tobytes()[:1024]
348 ns ± 10.4 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
%timeit buffer_view[:1024].tobytes()
177 ns ± 3.23 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
%timeit buffer[:1024].tobytes()
229 ns ± 6.94 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)