Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/14898
@srowen
but here, `delta -= target` breeze lib will call BLAS and it will usually
be 10x faster than normal loop because it use SIMD instructions. Here is some
performance information https://github.com/fommil/netlib-java
and , `delta := output` it is also much faster than normal loop, because in
breeze, it call `System.arraycopy`
http://stackoverflow.com/questions/18638743/is-it-better-to-use-system-arraycopy-than-a-for-loop-for-copying-arrays
thanks!
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
