Details
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Bug
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Resolution: Won't Do
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Major - P3
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None
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None
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None
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Query Execution
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ALL
Description
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:157: INEFFICIENT_RESERVE 123333 A "std::vector" has its capacity adjusted with "reserve()" in a manner that is likely to have severe performance penalties.