fact-bindata-storage-optimization.rst

Index keys that are of the BinData type are more efficiently stored in the index if:

• the binary subtype value is in the range of 0-7 or 128-135, and
• the length of the byte array is: 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, or 32.