The current return type is Result<&T, Error> which is two words long. It should be possible to change it to Result<&T, error::OutOfBounds> where OutOfBounds is a unit struct, this would reduce the size of the return type to 1 word (because &T is a non-null pointer).
Error should implement FromError<OutOfBounds> to keep the try! macro working.
The current return type is
Result<&T, Error>which is two words long. It should be possible to change it toResult<&T, error::OutOfBounds>whereOutOfBoundsis a unit struct, this would reduce the size of the return type to 1 word (because&Tis a non-null pointer).Errorshould implementFromError<OutOfBounds>to keep thetry!macro working.