Alex Abashev created IGNITE-28473:
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Summary: Concurrent message serialization in NIO workers causes
performance degradation
Key: IGNITE-28473
URL: https://issues.apache.org/jira/browse/IGNITE-28473
Project: Ignite
Issue Type: Task
Reporter: Alex Abashev
Assignee: Alex Abashev
Code-generated serialization mechanism uses the same buffer size checks on
every field write just like the previous serialization mechanism.
Right now fields of a message are written to the output stream in the same
order they are declared in the message class. That's why message serializer has
to perform buffer size checks for each individual field as it doesn't have any
information about the size of the next field.
But if one reorders the fields so that all fields of the same primitive type
are written in one batch, it is possible to perform buffer size check only
once. If number of fields and their type is known, serializer could ensure the
space in the buffer in one check. This would allow to save some CPU cycles.
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