Remko Popma created LOG4J2-1341:
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Summary: (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
*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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