NGA-TRAN opened a new issue #655: URL: https://github.com/apache/arrow-datafusion/issues/655
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Why doing experience in IOx, we have discovered that `SortPreservingMergeExec` is expensive and very CPU bound. [The issues are fully described here](https://github.com/influxdata/influxdb_iox/issues/1885) **Describe the solution you'd like** The SortPreservingMergeExec is known the be sub-optimal when it was implemented and at least 3 improvements have been identified inside the code. This ticket is to improve those and further if any. -- 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: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
