tustvold opened a new issue, #6162: URL: https://github.com/apache/arrow-datafusion/issues/6162
### Is your feature request related to a problem or challenge? SortPreservingMerge currently interleaves the execution of its input streams, and as a result all its inputs will be evaluated serially. This is unfortunate if its inputs are performing a potentially expensive operation, such as decoding parquet. ### Describe the solution you'd like Perhaps we should do something similar to RepartitionExec and spawn the inputs into separate tokio tasks, allowing their execution to be scheduled in parallel ### Describe alternatives you've considered Longer-term a true morsel-driven concurrency story might be nice (#2504) and would avoid needing to manually parallelise operators such as SortPreservingMerge, however, this might be a shorter-term mechanism to boost performance. ### Additional context _No response_ -- 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]
