> For the complete documentation index, see [llms.txt](https://help.novacuraflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.novacuraflow.com/release-information/flow/6.15/studio/6.15.3.md).

# 6.15.3

**New functionality**

Performance measuring mode - a tool to help designers to find bottlenecks in workflows. 

Test bench - more copy features added.

**Bug fixes**

* Fixed issue with subscribed workflows - the issue occurred if a fragment had been published with a new version in 6.15. Workflow affected by the bug requires fragments to be updated for the fix to take effect.
* Resolved issue with swimlane configuration validation.


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