Create and traverse avro schemas once per task (#296) #834
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* Cleanup and isolate the schema perf changes * add an _
smcnamara2-stripe
changed the title
pengyu-hou
approved these changes
Sep 26, 2024
hzding621
approved these changes
Nov 19, 2024
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Summary
This adds a SchemaTraverser to the chronon row creation logic, which allows callers of Row.to to specify how the output schema should be constructed.
At the core, this code is centered around removing the
AvroConversions.fromChrononSchemacall in the lambda passed fromfromChrononRow.Why / Goal
The proximate goal is to allow faster Avro Schema construction, avoiding repeated calls to fromChrononSchema in a tight loop. This has resulted in a 90+% reduction in CPU usage during the reduce phase of the GroupByUpload aggregation.
At stripe, several of our largest GroupByUpload apps are now using 50-80% fewer vcore-seconds per run.
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