Dmitry Konstantinov created CASSANDRA-20167:
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Summary: Reduce memory allocations in miscellaneous places along
write path
Key: CASSANDRA-20167
URL: https://issues.apache.org/jira/browse/CASSANDRA-20167
Project: Apache Cassandra
Issue Type: Improvement
Reporter: Dmitry Konstantinov
Attachments: image-2024-12-26-22-01-32-592.png,
image-2024-12-26-22-01-55-614.png, image-2024-12-26-22-02-44-040.png,
image-2024-12-26-22-03-49-018.png
Avoid unnecessary allocations in different places along write path:
* avoid iterator allocations if possible
* handle typical cases (such as a single row, single table writes) more
efficiently
* add fast paths for typical scenarios (like pending ranges is empty)
* memorize things which can be computed once
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