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https://issues.apache.org/jira/browse/LOG4J2-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390441#comment-15390441
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ASF GitHub Bot commented on LOG4J2-1341:
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GitHub user rzschech opened a pull request:
https://github.com/apache/logging-log4j2/pull/34
LOG4J2-1341 GC-free HighlightConverter and StyleConverter
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rzschech/logging-log4j2 master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/logging-log4j2/pull/34.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 #34
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commit 9ef40edc7521a5ba3380318adaad40797f9b7a63
Author: Richard Zschech <[email protected]>
Date: 2016-07-23T00:54:53Z
LOG4J2-1341 GC-free HighlightConverter and StyleConverter
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> (GC) Avoid allocating temporary objects in Pattern Converters for
> PatternLayout
> -------------------------------------------------------------------------------
>
> Key: LOG4J2-1341
> URL: https://issues.apache.org/jira/browse/LOG4J2-1341
> Project: Log4j 2
> Issue Type: Improvement
> Components: Pattern Converters
> Affects Versions: 2.5
> Reporter: Remko Popma
> Fix For: 2.7
>
>
> *To do*
> The following pattern converters can be modified to avoid creating temporary
> objects in their {{format}} method:
> * AbstractStyleNameConverter
> * EncodingPatternConverter
> * EqualsIgnoreCaseReplacementConverter
> * EqualsReplacementConverter
> * FullLocationPatternConverter
> * HighlightConverter
> * IntegerPatternConverter
> * MarkerPatternConverter
> * MaxLengthConverter
> * RelativeTimePatternConverter
> * SequenceNumberPatternConverter
> * StyleConverter
> *Investigate*
> The following pattern converters may be difficult to modify since they rely
> on JDK components that create temporary objects:
> * ExtendedThrowablePatternConverter
> * MapPatternConverter
> * MdcPatternConverter
> * NdcPatternConverter
> * RegexReplacementConverter
> * RootThrowablePatternConverter
> * ThrowablePatternConverter
> * UuidPatternConverter
> * VariablesNotEmptyReplacementConverter
> *Done*
> The following pattern converters already do not allocate temporary objects in
> their format method:
> * ClassNamePatternConverter
> * DatePatternConverter
> * FileLocationPatternConverter
> * LevelPatternConverter
> * LineLocationPatternConverter
> * LineSeparatorPatternConverter
> * LiteralPatternConverter (unless literal contains '${')
> * LoggerPatternConverter
> * MarkerSimpleNamePatternConverter
> * MessagePatternConverter
> * MethodLocationPatternConverter
> * NamePatternConverter
> * NanoTimePatternConverter
> * ThreadIdPatternConverter
> * ThreadNamePatternConverter
> * ThreadPriorityPatternConverter
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