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Posted to issues@ignite.apache.org by "Vladimir Ozerov (JIRA)" <ji...@apache.org> on 2017/09/25 08:21:00 UTC
[jira] [Updated] (IGNITE-1421) .NET: Optimize writes of ultra-dense
structures
[ https://issues.apache.org/jira/browse/IGNITE-1421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vladimir Ozerov updated IGNITE-1421:
------------------------------------
Fix Version/s: (was: 2.3)
> .NET: Optimize writes of ultra-dense structures
> -----------------------------------------------
>
> Key: IGNITE-1421
> URL: https://issues.apache.org/jira/browse/IGNITE-1421
> Project: Ignite
> Issue Type: Improvement
> Components: platforms
> Affects Versions: 1.1.4
> Reporter: Vladimir Ozerov
> Priority: Minor
> Labels: .net
>
> There is a case when we can dramatically increase marshal/unmarshal performance:
> 1) Type is a structure;
> 2) It contains only integer/float/double primitive types with well-defined;
> memory layout which is consistent with our serialization protocol;
> 3) We are sure that there are no gaps in it's memory layout.
> 4) User writes it as "marshal-aware" and fields write order is consistent with memory layout.
> In this case we can copy the whole structure into our stream with a single memcpy() operation. And we can read it from the stream as easy as [pointer dereference + position shift] (provided that target is on the stack).
> We should also disable handles for structs, since it does not make sense.
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