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Type:
Improvement
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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Query Execution
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v8.0
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QO 2024-07-22
Inefficient vector resizing with reserve.
This operation, if performed to grow large vectors, may take a very long time to complete. A vector's capacity is increased with reserve in a manner that causes many unnecessary copies.
/src/mongo/db/pipeline/document_source_lookup.cpp:269: INEFFICIENT_RESERVE 156773 A "std::vector" has its capacity adjusted with "reserve()" in a manner that is likely to have severe performance penalties.
- duplicates
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SERVER-68824 Coverity analysis defect 123333: Inefficient vector resizing with reserve.
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- Closed
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