[ARROW-6595] [Java] Avro - Experiment with "compiled" consumer delegates for performance.

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Java
• Labels: avro
• External issue URL: https://github.com/apache/arrow/issues/22951
• Assignee: Unassigned
• Reporter: Micah Kornfield
• Created: 18/Sep/19 05:55
• Updated: 11/Jan/23 07:48

Description

All consumers that rely on delegates (e.g. struct, composite, list, union, ...) require  megamorphic lookups which can't be inlined well by JIT.  

 

We should verify the performance different of a hand-coded consumer vs an existing delegate consumer

 

i.e. something like:

 

void consume(Decoder d)

{   ((IntConsumer)delegate).consume(d); }

 

compared to the existing implementation.  It is expected we will see a decent amount of performance improvement from this approach.  If we do, we should add an option to converter to generate new custom classes on the fly, that mimic the hand-coded option.