cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aleksey Yeschenko (Jira)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-15410) Avoid over-allocation of bytes for UTF8 string serialization
Date Tue, 19 Nov 2019 16:13:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-15410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977596#comment-16977596
] 

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. 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org


Mime
View raw message