Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/3484#issuecomment-65107341
@tgravescs Nishkam (who filed the bug) has most of the background info on
the performance impact. But, from a high level, installing a security manager
seems to introduce a non-trivial performance penatly into any application. Even
when the methods of the security manager are no-ops, it seems just having to
check them all the time adds a lot of overhead, since it's done even for
operations that should be generally very fast like accessing fields via
reflection.
If you're really really curious we can add instrumentation to measure the
performance later when we're not busy trying to get a release out.
---
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]
