GitHub user ooq opened a pull request: https://github.com/apache/spark/pull/14513
[SPARK-16928][SQL] Recursive call of ColumnVector::getInt() breaks JIT inlining ## What changes were proposed in this pull request? In both `OnHeapColumnVector` and `OffHeapColumnVector`, we implemented `getInt()` with the following code pattern: ``` public int getInt(int rowId) { if (dictionary == null) { return intData[rowId]; } else { return dictionary.decodeToInt(dictionaryIds.getInt(rowId)); } } ``` As `dictionaryIds` is also a `ColumnVector`, this results in a recursive call of `getInt()` and breaks JIT inlining. As a result, `getInt()` will not get inlined. We fix this by adding a separate method `getDictId()` specific for `dictionaryIds` to use. ## How was this patch tested? We tested the difference with the following aggregate query on a TPCDS dataset (with scale factor = 5): ``` select max(ss_sold_date_sk) as max_ss_sold_date_sk, from store_sales ``` The query runtime is improved, from 202ms (before) to 159ms (after). You can merge this pull request into a Git repository by running: $ git pull https://github.com/ooq/spark SPARK-16928 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/14513.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #14513 ---- commit 70e32c661cb9f0aea9c77ac26e8326268599317c Author: Qifan Pu <qifan...@gmail.com> Date: 2016-08-05T22:10:55Z Fix SPARK-16928. ---- --- 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 infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org