aggregate command writes results 3 times

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    • Type: Improvement
    • Resolution: Done
    • Priority: Major - P3
    • 2.2.0-rc0
    • Affects Version/s: None
    • Component/s: Aggregation Framework
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    • 3
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      Each Document result is written three times, to documentBuilder, resultArray, and result. Using subobjStart() and subarrayStart() only one write to the result buffer would be necessary.

                      BSONArrayBuilder resultArray; // where we'll stash the results
                for(bool hasDocument = !pSource->eof(); hasDocument;
                    hasDocument = pSource->advance()) {
                    intrusive_ptr<Document> pDocument(pSource->getCurrent());

                    /* add the document to the result set */
                    BSONObjBuilder documentBuilder;
                    pDocument->toBson(&documentBuilder);
                    resultArray.append(documentBuilder.done());
                }

                result.appendArray("result", resultArray.arr());

      Observed behavior: The aggregate command copies result documents out multiple times.
      Expected behavior: The aggregate command writes documents directly to the response builder.

            Assignee:
            Matt Dannenberg (Inactive)
            Reporter:
            Aaron Staple (Inactive)
            Votes:
            1 Vote for this issue
            Watchers:
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              Created:
              Updated:
              Resolved: