Sophie Blee-Goldman created KAFKA-8007:
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Summary: In-memory window store copies on fetch
Key: KAFKA-8007
URL: https://issues.apache.org/jira/browse/KAFKA-8007
Project: Kafka
Issue Type: Improvement
Reporter: Sophie Blee-Goldman
Assignee: Sophie Blee-Goldman
The current implementation of InMemoryWindowStore copies all record data into a
new list and returns an iterator over that list when fetching. That is
inefficient in terms of both memory and time. The fetching logic should be
moved to the iterators, which could be cleaned up as well (currently they rely
on ListIterator to provide peekNextKey() functionality, which is unnecessary).
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