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https://issues.apache.org/jira/browse/IGNITE-5097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148755#comment-16148755
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Vladimir Ozerov commented on IGNITE-5097:
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[~daradurvs],
Legacy features is part of normal product lifecycle. System properties are not
convenient form UX perspective. Hence, we should use configuration parameter.
It should be set to {{false}} by default, so that data saved on previous
version of Ignite can be read without problems.
> BinaryMarshaller should write ints in "varint" encoding where it makes sense
> ----------------------------------------------------------------------------
>
> Key: IGNITE-5097
> URL: https://issues.apache.org/jira/browse/IGNITE-5097
> Project: Ignite
> Issue Type: Task
> Components: general
> Affects Versions: 2.0
> Reporter: Vladimir Ozerov
> Assignee: Vyacheslav Daradur
> Labels: important, performance
> Fix For: 2.3
>
>
> There are a lot of places in the code where we write integers for some
> special purposes. Quite often their value will be vary small, so that
> applying "varint" format could save a lot of space at the cost of very low
> additional CPU overhead.
> Specifically:
> 1) Array/collection/map lengths
> 2) BigDecimal's (usually will save ~6 bytes)
> 3) Strings
> 4) Enum ordinals
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