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  1. Java Driver
  2. JAVA-2144

For Codec decoding, optimize code path for looking up Codec based on a BsonType

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • 3.0.0
    • 3.3.0
    • BSON, Performance
    • None

    Description

      For Document, BsonDocument, and DBObject Codec.decode implementations, there is a code path for looking up the Codec for a value that requires two lookups in a Map; first by one in BsonTypeClassMap, then followed by one in CodecCache. This could easily be turned into a single lookup in an array that has an entry for each BsonType and a value which is the Codec to use for that BsonType.

      Performance benchmarks show that the performance gains would be significant for simple documents.

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            jeff.yemin@mongodb.com Jeffrey Yemin
            jeff.yemin@mongodb.com Jeffrey Yemin
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              Created:
              Updated:
              Resolved: