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https://issues.apache.org/jira/browse/CASSANDRA-15410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977596#comment-16977596
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Aleksey Yeschenko commented on CASSANDRA-15410:
-----------------------------------------------
Committed to {{trunk}} as
[647bdd6a11970f80666d7f20b53af76fbda4ff14|https://github.com/apache/cassandra/commit/647bdd6a11970f80666d7f20b53af76fbda4ff14],
thanks. Made just one tiny tweak: switched encoding of UDT names and field
types to ascii strings as well.
> 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
> Assignee: Yifan Cai
> Priority: Normal
> Fix For: 4.0
>
>
> 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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