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# 21 What's new in Zabbix 6.4.16

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## Items

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#### More secure JavaScript preprocessing

The JavaScript function [atob](/manual/config/items/preprocessing/javascript/javascript_objects#global-javscript-functions) now returns an array of 8-bit unsigned integers instead of a decoded string.

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## Frontend

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#### Preprocessing test result truncation

When [testing preprocessing steps](/manual/config/items/preprocessing#testing), test results are now truncated to a maximum size of 512KB when sent to the frontend.
Note that data larger than 512KB is still processed fully by Zabbix server.

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## Templates

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#### New templates

A new template is available:

- [Jira Data Center by JMX](https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/app/jira_datacenter_jmx?at=refs%2Fheads%2Frelease%2F6.4), a template for monitoring Jira Data Center health.

You can get this template:

-   In *Data collection* → *Templates* in new installations;
-   If you are upgrading from previous versions, you can download new templates from the Zabbix [Git
    repository](https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates?at=refs%2Fheads%2Frelease%2F6.4)
    or find them in the *zabbix/templates* directory of the latest Zabbix version you have downloaded.
    Then, while in *Data collection* → *Templates*, you can import them manually into Zabbix.

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