Josh Rosen created SPARK-19555: ---------------------------------- Summary: Improve inefficient StringUtils.escapeLikeRegex() method Key: SPARK-19555 URL: https://issues.apache.org/jira/browse/SPARK-19555 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 2.0.0 Reporter: Josh Rosen
Spark's StringUtils.escapeLikeRegex() method is written inefficiently, performing tons of object allocations due to the use zip(), flatMap() , and mkString. Instead, I think method should be rewritten in an imperative style using a Java string builder. This method can become a performance bottleneck in cases where regex expressions are used with non-constant-foldable expressions (e.g. the regex expression comes from the data rather than being part of the query). Here's the code in question: https://github.com/apache/spark/blob/d785217b791882e075ad537852d49d78fc1ca31b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/StringUtils.scala#L28 -- 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