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Record codegen falls back to stock creator when a component is absent #380
Description
The generated record reader calls the canonical constructor directly only when the input supplied every component. Otherwise _recordBuild boxes all values into an Object[] and finishes through PropertyValueBuffer and the stock creator, even when the absent components would just be null.
Envelopes commonly declare a field a given message omits. With the reproducer from #378 (cached ObjectReader, JDK 25, Apple M3), one absent String component on an otherwise identical record:
| 3.3.0 | |
|---|---|
PayloadEnvelope (all components present) |
349 ns / 1120 B |
AbsentEnvelope (String err absent) |
460 ns / 1536 B |
Stock gives such a component the local's initial value anyway (PropertyValueBuffer._findMissing), so the direct call can be kept for it. PR: #381.
Activity
Add release notes for FasterXML#380
Blackbird: fill absent record components from stock's absent value (F…
Blackbird: fill absent record components from stock's absent value (F…
Simplify FasterXML#380 absent-component check; test scalar Optionals
[-]Blackbird 3.3.0: record codegen falls back to stock creator when a component is absent[/-][+]Record codegen falls back to stock creator when a component is absent[/+]Fix #380: Blackbird records skip stock creator for default absent com…
Blackbird: fill absent record components from stock's absent value (F…