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https://issues.apache.org/jira/browse/LOG4J2-898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14215722#comment-14215722
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Gary Gregory commented on LOG4J2-898:
-------------------------------------
I wonder if providing an implementation of
{{org.apache.logging.log4j.message.MessageFactory}} to delay the formatting
until it is needed would work for you?
When I look at {{org.apache.logging.log4j.message.StringFormattedMessage}} it
looks like String.format() is called on demand, not when the message is
created...
> Format messages asynchronously
> ------------------------------
>
> Key: LOG4J2-898
> URL: https://issues.apache.org/jira/browse/LOG4J2-898
> Project: Log4j 2
> Issue Type: Improvement
> Affects Versions: 2.0.2, 2.1
> Reporter: Steven Grossman
>
> Formatting a message can be an expensive operation (e.g. String.format) and
> it is undesirable for it to be done in the calling thread when using an async
> logger or appender.
> LOG4J2-763 moved this work to the calling thread. Would you consider
> bringing back the previous behavior via a config/system property?
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