[jira] [Closed] (IGNITE-4702) Optimize BinaryMarshaller field reading in case all object fields are of fixed size

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-4702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Ozerov closed IGNITE-4702.
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> Optimize BinaryMarshaller field reading in case all object fields are of fixed size
> -----------------------------------------------------------------------------------
>
>                 Key: IGNITE-4702
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4702
>             Project: Ignite
>          Issue Type: Task
>          Components: general
>            Reporter: Vladimir Ozerov
>              Labels: performance
>             Fix For: 2.0
>
>
> In order to get field position within {{BinaryObject}} we do the following:
> 1) Lookup schema
> 2) Get field order
> 3) Find field position in order
> 4) Jump to the field
> If all object fields have fixed length, then it's body will always be of the same size, and relative field positions will be constant. This also applicable to objects having only some fields of known size, if these fields are on the head positions.
> We can add this information to schema and modify lookup routine as follows:
> 1) Lookup schema
> 2) Get field position by field ID immediately
> 4) Jump to the field
> This will save us from footer lookups thus decreasing overall field lookup time. It could be especially important for queries.



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