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LUCENE-9424: add a performance warning to AttributeSource.captureState javadocs

This commit is contained in:
Mike McCandless 2020-07-27 11:11:35 -04:00
parent 6bf5f4a87f
commit e4c2be98fa
2 changed files with 8 additions and 0 deletions
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6
lucene/CHANGES.txt
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@ -183,6 +183,12 @@ Bug Fixes
--------------------- ---------------------
(No changes) (No changes)
Documentation
---------------------
* LUCENE-9424: Add a performance warning to AttributeSource.captureState javadocs (Haoyu Zhai)
Other Other
--------------------- ---------------------
(No changes) (No changes)

2
lucene/core/src/java/org/apache/lucene/util/AttributeSource.java
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@ -292,6 +292,8 @@ public class AttributeSource {
/** /**
* Captures the state of all Attributes. The return value can be passed to * Captures the state of all Attributes. The return value can be passed to
* {@link #restoreState} to restore the state of this or another AttributeSource. * {@link #restoreState} to restore the state of this or another AttributeSource.
*
* Be careful, this method comes with a cost of deep copying all attributes in the source.
*/ */
public final State captureState() { public final State captureState() {
final State state = this.getCurrentState(); final State state = this.getCurrentState();