Dmitry Konstantinov created CASSANDRA-21402:
-----------------------------------------------
Summary: Avoid type lookup in SerializationHeader#getType if
schema and SSTable are aligned
Key: CASSANDRA-21402
URL: https://issues.apache.org/jira/browse/CASSANDRA-21402
Project: Apache Cassandra
Issue Type: Improvement
Components: Local/SSTable
Reporter: Dmitry Konstantinov
Assignee: Dmitry Konstantinov
Attachments: image-2026-05-24-16-36-12-733.png
Cell.Serializer#deserialize lookup an actual type for every cell using
SerializationHeader#getType, it is ~27% of a cell deserialization CPU cost and
~5% of total CPU cost for a read scenario (10 row partition select, CPU bound)
if schema and SSTable are aligned we can avoid this lookup.
!image-2026-05-24-16-36-12-733.png|width=800!
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
