Kazuaki Ishizaki created SPARK-20046: ----------------------------------------
Summary: Facilitate loop optimizations in a JIT compiler regarding sqlContext.read.parquet() Key: SPARK-20046 URL: https://issues.apache.org/jira/browse/SPARK-20046 Project: Spark Issue Type: Bug Components: SQL Affects Versions: 2.2.0 Reporter: Kazuaki Ishizaki [This article|https://databricks.com/blog/2017/02/16/processing-trillion-rows-per-second-single-machine-can-nested-loop-joins-fast.html] suggests that better generated code can improve performance by facilitating compiler optimizations. This JIRA changes the generated code for {{sqlContext.read.parquet("file")}} to facilitate loop optimizations in a JIT compiler for achieving better performance. In particular, [this stackoverflow entry|http://stackoverflow.com/questions/40629435/fast-parquet-row-count-in-spark] suggests me to improve performance of {{sqlContext.read.parquet("file").count}}}. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org