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Posted to common-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2016/08/03 14:36:20 UTC
[jira] [Updated] (HADOOP-13438) Optimize IPC server protobuf
decoding
[ https://issues.apache.org/jira/browse/HADOOP-13438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kihwal Lee updated HADOOP-13438:
--------------------------------
Status: Patch Available (was: Open)
Submitting the patch as HADOOP-13426 is resolved.
> Optimize IPC server protobuf decoding
> -------------------------------------
>
> Key: HADOOP-13438
> URL: https://issues.apache.org/jira/browse/HADOOP-13438
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HADOOP-13438.patch
>
>
> The current use of the protobuf API uses an expensive code path. The builder uses the parser to instantiate a message, then copies the message into the builder. The parser is creating multi-layered internally buffering streams that cause excessive byte[] allocations.
> Using the parser directly with a coded input stream backed by the byte[] from the wire will take a fast-path straight to the pb message's ctor. Substantially less garbage is generated.
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