Haoyu Zhai created LUCENE-9424:
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Summary: Have a warning comment for AttributeSource.captureState
Key: LUCENE-9424
URL: https://issues.apache.org/jira/browse/LUCENE-9424
Project: Lucene - Core
Issue Type: Improvement
Components: general/javadocs
Reporter: Haoyu Zhai
{{AttributeSource.captureState}} is a powerful method that can be used to store
and (later on) restore the current state, but it comes with a cost of copying
all attributes in this source and sometimes can be a big cost if called
multiple times.
We could probably add a warning to indicate this cost, as this method is
encapsulated quite well and sometimes people who use it won't be aware of the
cost.
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