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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:
--------------------------------
Description:
*To do*
The following pattern converters can be modified to avoid creating temporary
objects in their {{format}} method:
* EncodingPatternConverter
* MapPatternConverter (replace MapMessage internal SortedMap JDK data structure
with StringMap)
*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:
* (/) AbstractStyleNameConverter (since 2.8)
* (/) HighlightConverter (since 2.7, thanks to Richard Zschech)
* (/) StyleConverter (since 2.7, thanks to Richard Zschech)
* (/) DatePatternConverter
* (/) EqualsIgnoreCaseReplacementConverter (since 2.8)
* (/) EqualsReplacementConverter (since 2.8)
* (/) IntegerPatternConverter (since 2.8)
* (/) LevelPatternConverter
* (/) LineSeparatorPatternConverter
* (/) LiteralPatternConverter (unless literal contains '${')
* (/) LoggerPatternConverter
* (/) MarkerPatternConverter (since 2.8)
* (/) MarkerSimpleNamePatternConverter
* (/) MaxLengthConverter (since 2.8)
* (/) MdcPatternConverter (since 2.7)
* (/) MessagePatternConverter (unless a Jansi or HTML renderer is configured or
message has '${' lookups)
* (/) NamePatternConverter
* (/) NanoTimePatternConverter
* (/) NdcPatternConverter (since 2.8 ContextStack implementations implement the
StringBuilderFormattable interface - note that the ThreadContext stack is
cloned for each log event and is not garbage-free)
* (/) RelativeTimePatternConverter (since 2.8)
* (/) SequenceNumberPatternConverter (since 2.8)
* (/) ThreadIdPatternConverter
* (/) ThreadNamePatternConverter
* (/) ThreadPriorityPatternConverter
was:
*To do*
The following pattern converters can be modified to avoid creating temporary
objects in their {{format}} method:
* EncodingPatternConverter
* MapPatternConverter (replace MapMessage internal SortedMap JDK data structure
with StringMap)
* NdcPatternConverter (let ContextStack implementations implement the
StringBuilderFormattable interface)
*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:
* (/) AbstractStyleNameConverter (since 2.8)
* (/) HighlightConverter (since 2.7, thanks to Richard Zschech)
* (/) StyleConverter (since 2.7, thanks to Richard Zschech)
* (/) DatePatternConverter
* (/) EqualsIgnoreCaseReplacementConverter (since 2.8)
* (/) EqualsReplacementConverter (since 2.8)
* (/) IntegerPatternConverter (since 2.8)
* (/) LevelPatternConverter
* (/) LineSeparatorPatternConverter
* (/) LiteralPatternConverter (unless literal contains '${')
* (/) LoggerPatternConverter
* (/) MarkerPatternConverter (since 2.8)
* (/) MarkerSimpleNamePatternConverter
* (/) MaxLengthConverter (since 2.8)
* (/) MdcPatternConverter (since 2.7)
* (/) MessagePatternConverter (unless a Jansi or HTML renderer is configured or
message has '${' lookups)
* (/) NamePatternConverter
* (/) NanoTimePatternConverter
* (/) RelativeTimePatternConverter (since 2.8)
* (/) SequenceNumberPatternConverter (since 2.8)
* (/) 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:
> * EncodingPatternConverter
> * MapPatternConverter (replace MapMessage internal SortedMap JDK data
> structure with StringMap)
> *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:
> * (/) AbstractStyleNameConverter (since 2.8)
> * (/) HighlightConverter (since 2.7, thanks to Richard Zschech)
> * (/) StyleConverter (since 2.7, thanks to Richard Zschech)
> * (/) DatePatternConverter
> * (/) EqualsIgnoreCaseReplacementConverter (since 2.8)
> * (/) EqualsReplacementConverter (since 2.8)
> * (/) IntegerPatternConverter (since 2.8)
> * (/) LevelPatternConverter
> * (/) LineSeparatorPatternConverter
> * (/) LiteralPatternConverter (unless literal contains '${')
> * (/) LoggerPatternConverter
> * (/) MarkerPatternConverter (since 2.8)
> * (/) MarkerSimpleNamePatternConverter
> * (/) MaxLengthConverter (since 2.8)
> * (/) MdcPatternConverter (since 2.7)
> * (/) MessagePatternConverter (unless a Jansi or HTML renderer is configured
> or message has '${' lookups)
> * (/) NamePatternConverter
> * (/) NanoTimePatternConverter
> * (/) NdcPatternConverter (since 2.8 ContextStack implementations implement
> the StringBuilderFormattable interface - note that the ThreadContext stack is
> cloned for each log event and is not garbage-free)
> * (/) RelativeTimePatternConverter (since 2.8)
> * (/) SequenceNumberPatternConverter (since 2.8)
> * (/) ThreadIdPatternConverter
> * (/) ThreadNamePatternConverter
> * (/) ThreadPriorityPatternConverter
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