brancz opened a new issue, #10247: URL: https://github.com/apache/arrow-rs/issues/10247
### Is your feature request related to a problem or challenge? I noticed casting dict(dict(string)) to dict(string) in our profiling data being more prominent than I would have liked, so I checked and realized that there is no optimized path. ### Describe the solution you'd like When the shape of the dict cast is essentially flattening dict(dict(type)) to dict(type), reuse the innermost values array and only rewrite the index array. ### Describe alternatives you've considered Not optimize. ### Additional context n/a -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
