houqp opened a new issue #677: URL: https://github.com/apache/arrow-datafusion/issues/677
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] (This section helps Arrow developers understand the context and *why* for this feature, in addition to the *what*) We are using both `std::collections::HashMap` and `hashbrown::HashMap` in datafusion, it would be better to consistently use only one of them. hashbrown's official readme has the following statement: > Since Rust 1.36, this is now the HashMap implementation for the Rust standard library. However you may still want to use this crate instead since it works in environments without std, such as embedded systems and kernels. However, it's unclear whether Rust std also uses ahash as the default hasher. If not, it seems like hashbrown would still be a better choice when it comes to performance. **Describe alternatives you've considered** A clear and concise description of any alternative solutions or features you've considered. **Additional context** Follow up from https://github.com/apache/arrow-datafusion/pull/676#discussion_r663544711. -- 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]
