Use SortedMapState for optimization of @RequiresTimeSortedInput
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core
improvement
java
P3
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- Java
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Description
The current implementation of @RequiresTimeSortedInput uses BagState, which is read and sorted upon watermark update. This can be improved once SortedMapState is available.
Imported from Jira [BEAM-9256](https://issues.apache.org/jira/browse/BEAM-9256). Original Jira may contain additional context.
Reported by: janl.
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