zhengruifeng opened a new pull request #28473: URL: https://github.com/apache/spark/pull/28473
### What changes were proposed in this pull request? 1, add new param blockSize; 2, add a new class InstanceBlock; 3, if blockSize==1, keep original behavior; if blockSize>1, stack input vectors to blocks (like ALS/MLP); 4, if blockSize>1, standardize the input outside of optimization procedure; ### Why are the changes needed? it will obtain performance gain on dense datasets 1, reduce RAM to persist traing dataset; 2, use Level-2 BLAS routines; ### Does this PR introduce _any_ user-facing change? Yes, a new param is added ### How was this patch tested? existing and added testsuites ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
