zhengruifeng opened a new pull request, #57913: URL: https://github.com/apache/spark/pull/57913
### What changes were proposed in this pull request? Create ALSModel's prediction UDF during transform after snapshotting rank. The UDF no longer captures the ALSModel instance. The serialized prediction UDF decreases from 5,040 bytes to 2,815 bytes (44.1%). ### Why are the changes needed? Avoiding the model capture reduces the memory retained by the transform closure, which is especially useful for Spark Connect server workloads. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Compiled the edited ALS source and serialized the generated prediction UDF with Java serialization. The existing ALSSuite covers the unchanged prediction behavior. ### Was this patch authored or co-authored using generative AI tooling? Generated-by: Codex (GPT-5) -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
