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Posted to dev@ignite.apache.org by "Vladimir Ozerov (JIRA)" <ji...@apache.org> on 2016/10/14 13:27:20 UTC
[jira] [Created] (IGNITE-4085) Binary objets: Compare fields of
well-known types without deserialization.
Vladimir Ozerov created IGNITE-4085:
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Summary: Binary objets: Compare fields of well-known types without deserialization.
Key: IGNITE-4085
URL: https://issues.apache.org/jira/browse/IGNITE-4085
Project: Ignite
Issue Type: Task
Components: binary
Affects Versions: 1.7
Reporter: Vladimir Ozerov
Fix For: 1.8
It is not efficient to use {{BinaryField.value}} directly when comparing binary objects because it leads to "materialization" of the field.
Instead, when well-known type is met, we should simply find field start in both objects and perform usual byte-by-byte comparison.
E.g., for string it will be:
1) Find position
2) Compare lengths (readInt)
3) Compare contents byte-by-byte.
The same goes for other types:
1) Primitive arrays
2) UUID
3) Data/TimeStamp.
Please ensure that byte-by-byte comparison is performed efficiently, e.g. that we compare bigger chunks (e.g. 8 bytes at once).
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