Vladimir Ozerov created IGNITE-6418:
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Summary: Binary: optionally write integer datatypes with varint
encoding
Key: IGNITE-6418
URL: https://issues.apache.org/jira/browse/IGNITE-6418
Project: Ignite
Issue Type: Task
Components: binary
Affects Versions: 2.1
Reporter: Vladimir Ozerov
Currently all integer data types are written as is. {{Integer}} always takes 4
bytes, {{Long}} - 8 bytes, etc.
There is well-known technique called "varint encoding" which can compress
integer values [1]. When used, {{Integer}} can take 1-5 bytes, {{Long}} - 1-10
bytes. So when values are small enough we can save a lot of space.
But this technique is not unversal, as big encoded values might require more
bytes comparing to plain form. Also it might cause slowdowns in SQL engine. So
this approach cannot be applied globally. Instead, we should allow users to
control whether they want to use this technique or not.
One possible approach is to add some annotation and several new methods to
{{BinaryWriter}} and {{BinaryReader}}, which will control whether varint is
used or not.
[1] https://developers.google.com/protocol-buffers/docs/encoding#varints
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