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https://issues.apache.org/jira/browse/FLINK-7411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121812#comment-16121812
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ASF GitHub Bot commented on FLINK-7411:
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GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/4517
[FLINK-7411][network] minor performance improvements in NettyMessage
## What is the purpose of the change
This PR adds some (minor) performance improvements to `NettyMessage` which
I came across: using a `switch` rather than multiple `if...ifelse...ifelse...`
avoiding unneeded virtual method calls.
## Brief change log
- use a switch rather than multiple if conditions
- use static `readFrom` methods to create instances of the message sub types
## Verifying this change
This change is already covered by existing tests, such as
`NettyMessageSerializationTest`.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (yes)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes, if you consider
network communication part of this)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/NicoK/flink flink-7411
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4517.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4517
----
commit b33e036b43d00ddf564f105280894f6287dd3e92
Author: Nico Kruber <n...@data-artisans.com>
Date: 2017-08-07T15:38:36Z
[FLINK-7411][network] minor (performance) improvements in NettyMessage
* use a switch rather than multiple if conditions
* use static `readFrom` methods to create instances of the message sub types
----
> minor performance improvements in NettyMessage
> ----------------------------------------------
>
> Key: FLINK-7411
> URL: https://issues.apache.org/jira/browse/FLINK-7411
> Project: Flink
> Issue Type: Improvement
> Components: Network
> Affects Versions: 1.4.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Minor
>
> {{NettyMessage}} may be improved slightly performance-wise in these regards:
> - in {{NettyMessage.NettyMessageDecoder#decode()}}: instead of having
> multiple if-elseif-... use a switch to cycle through the message ID
> - use a static {{NettyMessage}} subtype {{readFrom(ByteBuf buffer)}} - we do
> not really need to have a virtual function here
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