[jira] [Assigned] (SPARK-22330) Linear containsKey operation for serialized maps.
[ https://issues.apache.org/jira/browse/SPARK-22330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Wenchen Fan reassigned SPARK-22330: --- Assignee: Alexander > Linear containsKey operation for serialized maps. > - > > Key: SPARK-22330 > URL: https://issues.apache.org/jira/browse/SPARK-22330 > Project: Spark > Issue Type: Bug > Components: Spark Core >Affects Versions: 1.2.1, 2.2.0 >Reporter: Alexander >Assignee: Alexander > Labels: performance > Fix For: 2.3.0 > > Original Estimate: 5m > Remaining Estimate: 5m > > One of our production application which aggressively uses cached spark RDDs > degraded after increasing volumes of data though it shouldn't. Fast profiling > session showed that the slowest part was SerializableMapWrapper#containsKey: > it delegates get and remove to actual implementation, but containsKey is > inherited from AbstractMap which is implemented in linear time via iteration > over whole keySet. A workaround was simple: replacing all containsKey with > get(key) != null solved the issue. > Nevertheless, it would be much simpler for everyone if the issue will be > fixed once and for all. > A fix is straightforward, delegate containsKey to actual implementation. -- This message was sent by Atlassian JIRA (v6.4.14#64029) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Assigned] (SPARK-22330) Linear containsKey operation for serialized maps.
[ https://issues.apache.org/jira/browse/SPARK-22330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-22330: Assignee: (was: Apache Spark) > Linear containsKey operation for serialized maps. > - > > Key: SPARK-22330 > URL: https://issues.apache.org/jira/browse/SPARK-22330 > Project: Spark > Issue Type: Bug > Components: Spark Core >Affects Versions: 1.2.1, 2.2.0 >Reporter: Alexander > Labels: performance > Original Estimate: 5m > Remaining Estimate: 5m > > One of our production application which aggressively uses cached spark RDDs > degraded after increasing volumes of data though it shouldn't. Fast profiling > session showed that the slowest part was SerializableMapWrapper#containsKey: > it delegates get and remove to actual implementation, but containsKey is > inherited from AbstractMap which is implemented in linear time via iteration > over whole keySet. A workaround was simple: replacing all containsKey with > get(key) != null solved the issue. > Nevertheless, it would be much simpler for everyone if the issue will be > fixed once and for all. > A fix is straightforward, delegate containsKey to actual implementation. -- This message was sent by Atlassian JIRA (v6.4.14#64029) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Assigned] (SPARK-22330) Linear containsKey operation for serialized maps.
[ https://issues.apache.org/jira/browse/SPARK-22330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-22330: Assignee: Apache Spark > Linear containsKey operation for serialized maps. > - > > Key: SPARK-22330 > URL: https://issues.apache.org/jira/browse/SPARK-22330 > Project: Spark > Issue Type: Bug > Components: Spark Core >Affects Versions: 1.2.1, 2.2.0 >Reporter: Alexander >Assignee: Apache Spark > Labels: performance > Original Estimate: 5m > Remaining Estimate: 5m > > One of our production application which aggressively uses cached spark RDDs > degraded after increasing volumes of data though it shouldn't. Fast profiling > session showed that the slowest part was SerializableMapWrapper#containsKey: > it delegates get and remove to actual implementation, but containsKey is > inherited from AbstractMap which is implemented in linear time via iteration > over whole keySet. A workaround was simple: replacing all containsKey with > get(key) != null solved the issue. > Nevertheless, it would be much simpler for everyone if the issue will be > fixed once and for all. > A fix is straightforward, delegate containsKey to actual implementation. -- This message was sent by Atlassian JIRA (v6.4.14#64029) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
