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https://issues.apache.org/jira/browse/LOG4J2-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Remko Popma updated LOG4J2-1341:
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Description:
*To do*
The following pattern converters can be modified to avoid creating temporary
objects in their {{format}} method:
* AbstractStyleNameConverter
* EncodingPatternConverter
* EqualsIgnoreCaseReplacementConverter
* EqualsReplacementConverter
* IntegerPatternConverter
* MarkerPatternConverter
* MaxLengthConverter
* MapPatternConverter
* MdcPatternConverter
* NdcPatternConverter
* RelativeTimePatternConverter
* SequenceNumberPatternConverter
*Investigate*
The following pattern converters may be difficult to modify since they rely on
JDK components that create temporary objects:
* (-) ExtendedThrowablePatternConverter
* (-) RegexReplacementConverter
* (-) RootThrowablePatternConverter
* (-) ThrowablePatternConverter
* (-) UuidPatternConverter
* (-) VariablesNotEmptyReplacementConverter
* (-) ClassNamePatternConverter (location information requires creating
StackTraceElements)
* (-) FileLocationPatternConverter
* (-) FullLocationPatternConverter
* (-) LineLocationPatternConverter
* (-) MethodLocationPatternConverter
*Done*
The following pattern converters already do not allocate temporary objects in
their format method:
* (/) HighlightConverter (Thanks to Richard Zschech)
* (/) StyleConverter (Thanks to Richard Zschech)
* (/) DatePatternConverter
* (/) LevelPatternConverter
* (/) LineSeparatorPatternConverter
* (/) LiteralPatternConverter (unless literal contains '${')
* (/) LoggerPatternConverter
* (/) MarkerSimpleNamePatternConverter
* (/) MessagePatternConverter (unless a Jansi or HTML renderer is configured or
message has '${' lookups)
* (/) NamePatternConverter
* (/) NanoTimePatternConverter
* (/) ThreadIdPatternConverter
* (/) ThreadNamePatternConverter
* (/) ThreadPriorityPatternConverter
was:
*To do*
The following pattern converters can be modified to avoid creating temporary
objects in their {{format}} method:
* AbstractStyleNameConverter
* EncodingPatternConverter
* EqualsIgnoreCaseReplacementConverter
* EqualsReplacementConverter
* FullLocationPatternConverter
* IntegerPatternConverter
* MarkerPatternConverter
* MaxLengthConverter
* RelativeTimePatternConverter
* SequenceNumberPatternConverter
*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:
* (/) HighlightConverter (Thanks to Richard Zschech)
* (/) StyleConverter (Thanks to Richard Zschech)
* ClassNamePatternConverter
* DatePatternConverter
* FileLocationPatternConverter
* LevelPatternConverter
* LineLocationPatternConverter
* LineSeparatorPatternConverter
* LiteralPatternConverter (unless literal contains '${')
* LoggerPatternConverter
* MarkerSimpleNamePatternConverter
* MessagePatternConverter
* MethodLocationPatternConverter
* NamePatternConverter
* NanoTimePatternConverter
* ThreadIdPatternConverter
* ThreadNamePatternConverter
* ThreadPriorityPatternConverter
> (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: 2.8
>
>
> *To do*
> The following pattern converters can be modified to avoid creating temporary
> objects in their {{format}} method:
> * AbstractStyleNameConverter
> * EncodingPatternConverter
> * EqualsIgnoreCaseReplacementConverter
> * EqualsReplacementConverter
> * IntegerPatternConverter
> * MarkerPatternConverter
> * MaxLengthConverter
> * MapPatternConverter
> * MdcPatternConverter
> * NdcPatternConverter
> * RelativeTimePatternConverter
> * SequenceNumberPatternConverter
> *Investigate*
> The following pattern converters may be difficult to modify since they rely
> on JDK components that create temporary objects:
> * (-) ExtendedThrowablePatternConverter
> * (-) RegexReplacementConverter
> * (-) RootThrowablePatternConverter
> * (-) ThrowablePatternConverter
> * (-) UuidPatternConverter
> * (-) VariablesNotEmptyReplacementConverter
> * (-) ClassNamePatternConverter (location information requires creating
> StackTraceElements)
> * (-) FileLocationPatternConverter
> * (-) FullLocationPatternConverter
> * (-) LineLocationPatternConverter
> * (-) MethodLocationPatternConverter
> *Done*
> The following pattern converters already do not allocate temporary objects in
> their format method:
> * (/) HighlightConverter (Thanks to Richard Zschech)
> * (/) StyleConverter (Thanks to Richard Zschech)
> * (/) DatePatternConverter
> * (/) LevelPatternConverter
> * (/) LineSeparatorPatternConverter
> * (/) LiteralPatternConverter (unless literal contains '${')
> * (/) LoggerPatternConverter
> * (/) MarkerSimpleNamePatternConverter
> * (/) MessagePatternConverter (unless a Jansi or HTML renderer is configured
> or message has '${' lookups)
> * (/) NamePatternConverter
> * (/) NanoTimePatternConverter
> * (/) ThreadIdPatternConverter
> * (/) ThreadNamePatternConverter
> * (/) ThreadPriorityPatternConverter
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