Mark Payne created NIFI-14255:
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Summary: SimpleRecordSchema.equals method is very slow
Key: NIFI-14255
URL: https://issues.apache.org/jira/browse/NIFI-14255
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Reporter: Mark Payne
Assignee: Mark Payne
The equals method for SimpleRecordSchema calls {{isRecursive()}} which is very
slow. The method converts a List<RecordField> into a Stream, and then for each
element calls DataType.isRecursive() which often does the same. Stream creation
is very slow. This causes any {{Map<RecordSchema, ?>}} type of structure to be
very slow.
We can re-implement to avoid any stream creation. In addition, once the
{{isRecursive()}} method finishes its calculation, its value can be stored in a
member variable. The value will not change unless its fields change. So we can
just lazily initialize the member variable and clear it if fields are changed.
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