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Matt Sicker commented on LOG4J2-3441:
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Those are good points. Given that PatternConverter plugins are essentially
plugins to plugins, they're deferred until the owning plugins are created. I
did make an attempt at refactoring these plugins to better support lazy
loading, but it started becoming a fairly invasive change. I'll update the
description of this to close as implemented.
> Defer loading of StrLookup and PatternConverter plugin classes until first use
> ------------------------------------------------------------------------------
>
> Key: LOG4J2-3441
> URL: https://issues.apache.org/jira/browse/LOG4J2-3441
> Project: Log4j 2
> Issue Type: Improvement
> Components: Lookups, Pattern Converters, Plugins
> Reporter: Matt Sicker
> Assignee: Matt Sicker
> Priority: Major
>
> StrLookup and PatternConverter plugins are eagerly loaded at startup. At this
> point, these are a fairly large number of classes! If these plugins could be
> lazily loaded similar to how Core category plugins aren't loaded until first
> used in a configuration, that should shave off some startup time.
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