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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3599) GSoC: Code Generation in Serializers
Date Wed, 14 Sep 2016 08:48:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15489846#comment-15489846
] 

ASF GitHub Bot commented on FLINK-3599:
---------------------------------------

Github user ggevay commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2211#discussion_r78708846
  
    --- Diff: flink-core/pom.xml ---
    @@ -76,6 +76,18 @@ under the License.
     			<artifactId>commons-collections</artifactId>
     		</dependency>
     		
    +		<dependency>
    +			<groupId>org.codehaus.janino</groupId>
    +			<artifactId>janino</artifactId>
    +			<version>2.7.8</version>
    +		</dependency>
    +
    +		<dependency>
    +			<groupId>org.freemarker</groupId>
    +			<artifactId>freemarker</artifactId>
    +			<version>2.3.24-incubating</version>
    +		</dependency>
    +
    --- End diff --
    
    You can update Janino to `3.0.1` and FreeMarker to `2.3.25-incubating`


> GSoC: Code Generation in Serializers
> ------------------------------------
>
>                 Key: FLINK-3599
>                 URL: https://issues.apache.org/jira/browse/FLINK-3599
>             Project: Flink
>          Issue Type: Improvement
>          Components: Type Serialization System
>            Reporter: Márton Balassi
>            Assignee: Gabor Horvath
>              Labels: gsoc2016, mentor
>
> The current implementation of the serializers can be a
> performance bottleneck in some scenarios. These performance problems were
> also reported on the mailing list recently [1].
> E.g. the PojoSerializer uses reflection for accessing the fields, which is slow [2].
> For the complete proposal see [3].
> [1] http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Tuple-performance-and-the-curious-JIT-compiler-td10666.html
> [2] https://github.com/apache/flink/blob/master/flink-core/src/main/java/org/apache/flink/api/java/typeutils/runtime/PojoSerializer.java#L369
> [3] https://docs.google.com/document/d/1VC8lCeErx9kI5lCMPiUn625PO0rxR-iKlVqtt3hkVnk



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