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  1. Core Server
  2. SERVER-30761

Optimize parsing code for top-level MatchExpressions

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 3.6.0-rc1
    • Internal Code
    • None
    • Fully Compatible
    • Query 2017-09-11, Query 2017-10-02, Query 2017-10-23
    • 0

    Description

      The MatchExpression parser has a giant if block that performs many string comparisons as it attempts to parse a top-level keyword. We should attempt to optimize this to reduce the number of string comparisons.

      A hash map seems like a better choice.

      Attachments

        Issue Links

          causes

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-32302 for-each loop over BSONObj is slower than explicit BSONObjIterator in MatchExpressionParser code

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              blake.oler@mongodb.com Blake Oler
              kyle.suarez@mongodb.com Kyle Suarez
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              Dates

                Created:
                Updated:
                Resolved: