[jira] [Assigned] (KAFKA-9855) dont waste memory allocating Struct and values objects for Schemas with no fields

["radai rosenblatt (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-9855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

radai rosenblatt reassigned KAFKA-9855:
---------------------------------------

    Assignee:     (was: radai rosenblatt)

> dont waste memory allocating Struct and values objects for Schemas with no fields
> ---------------------------------------------------------------------------------
>
>                 Key: KAFKA-9855
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9855
>             Project: Kafka
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 2.4.0, 2.4.1
>            Reporter: radai rosenblatt
>            Priority: Major
>
> at the time of this writing there are 6 schemas in kafka APIs with no fields - 3 versions each of LIST_GROUPS and API_VERSIONS.
> under some workloads this may result in the creation of a lot of Struct objects with an Object[0] for values when deserializing those requests from the wire.
> in one particular heap dump we've found a significant amount of heap space wasted on creating such objects.



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