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Posted to commits@cassandra.apache.org by "Yifan Cai (Jira)" <ji...@apache.org> on 2019/11/11 23:01:00 UTC
[jira] [Created] (CASSANDRA-15410) Avoid over-allocation of bytes
for UTF8 string serialization
Yifan Cai created CASSANDRA-15410:
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Summary: Avoid over-allocation of bytes for UTF8 string serialization
Key: CASSANDRA-15410
URL: https://issues.apache.org/jira/browse/CASSANDRA-15410
Project: Cassandra
Issue Type: Improvement
Components: Messaging/Client
Reporter: Yifan Cai
In the current message encoding implementation, it first calculates the `encodeSize` and allocates the bytebuffer with that size.
However, during encoding, it assumes the worst case of writing UTF8 string to allocate bytes, i.e. assuming each letter takes 3 bytes.
The over-estimation further leads to resizing the underlying array and data copy.
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