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https://issues.apache.org/jira/browse/LOG4J2-1271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150403#comment-15150403
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Remko Popma edited comment on LOG4J2-1271 at 2/17/16 12:07 PM:
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My idea is to avoid creating a String instance by calling
StringBuilder.append(param) when we created the formatted message text.
And the param cannot have mutated yet at this time because we build the
formatted message text before we do the hand-off to another thread.
was (Author: [email protected]):
My idea is to avoid creating a String instance by calling
StringBuilder.append(param) when we created the formatted message text.
> ParameterizedMessage optimization
> ---------------------------------
>
> Key: LOG4J2-1271
> URL: https://issues.apache.org/jira/browse/LOG4J2-1271
> Project: Log4j 2
> Issue Type: Improvement
> Components: API
> Affects Versions: 2.5
> Reporter: Remko Popma
> Assignee: Remko Popma
>
> ParameterizedMessage creates unnecessary objects and does other unnecessary
> work in its constructor.
> On the other hand, it does not create the full formatted string it will
> eventually need to return from {{getFormattedMessage()}}.
> I propose the following changes:
> * Don't call {{argumentsToStrings}} in the constructor. Converting the
> parameter Object[] array to a String[] array should only be done when
> necessary: when this ParameterizedMessage is serialized.
> * Don't copy the parameter Object[] array to a new array. Instead clone the
> array when the {{getParameters()}} method is called.
> * In the constructor, build the fully formatted message. This combines the
> work done by {{formatStringArgs(String, String[])}} and
> {{argumentsToStrings(Object[])}} and avoids the issue mentioned in LOG4J2-763.
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