Mark Payne created NIFI-9309:
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Summary: Improve UI responsiveness
Key: NIFI-9309
URL: https://issues.apache.org/jira/browse/NIFI-9309
Project: Apache NiFi
Issue Type: Improvement
Components: Core Framework, Core UI
Reporter: Mark Payne
Assignee: Mark Payne
There are a few different small improvements that can be made to the backend
that will result in far better UI performance in some situations:
* Include a uiOnly query parameter when the request is made to fetch the flow
for a ProcessGroup. This can filter out specific fields such as processor
properties & property descriptors. If the UI passes in this query parameter, we
can avoid populating much of the DTO objects. This means the request is much
smaller so in a cluster, it's much less to deserialize/parse/serialize when
merging responses, and it means that the UI has a lot less json to parse.
* When attempting to access the Variable Registry for a given Process Group,
we are very inefficient in how we determine which components are affected by a
given variable. Instead of re-compiling the Expression Language for every
property, we should do it only once and make that a part of the
PropertyConfiguration object and make use of that.
* When obtaining the bulletins for a given component, we are also very
inefficient. We iterate over many RingBuffer objects, filtering entities for
each. But if we know the component & process group ID of the component whose
bulletins we are interested in, we can instead just jump straight to the
appropriate RingBuffer by fetching it from the Map.
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