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https://issues.apache.org/jira/browse/LOG4J2-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15392429#comment-15392429
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ASF GitHub Bot commented on LOG4J2-1341:
----------------------------------------
Github user rzschech commented on the issue:
https://github.com/apache/logging-log4j2/pull/36
This change is related to GC-free patterns as it allows
DatePatternConverter to support a timezone parameter and remain GC-free. Before
this change the DatePatternConverter falls back to the non-GC-free
FastDateFormat if there is a timezone parameter.
This is not related to LOG4J2-1246 as it is not outputting the timezone
information. It is just outputting the date/time relative to the timezone
parameter rather than the default timezone.
> (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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