Package org.apache.drill.exec.compile.bytecode

Bytecode manipulation utilities for stitching together runtime-generated code with prebuilt templates.

See: Description

Class Summary

Class	Description
DirectSorter
InstructionModifier
MethodAnalyzer<V extends org.objectweb.asm.tree.analysis.Value>	Analyzer that allows us to inject additional functionality into ASMs basic analysis.
ReplacingBasicValue	BasicValue with additional tracking information used to determine the replaceability of the value (a holder, or boxed value) for scalar replacement purposes.
ReplacingInterpreter
ScalarReplacementNode
ScalarReplacementTypes	Reference list of classes we will perform scalar replacement on.
TrackingInstructionList
ValueHolderReplacementVisitor

Package org.apache.drill.exec.compile.bytecode Description

Bytecode manipulation utilities for stitching together runtime-generated code with prebuilt templates. Also includes a number of performance optimizations, including scalar replacement for small data-only objects to avoid object churn and indirection. The object definitions are convenient for defining user-facing APIs, such as Drill's UDF interface, but end up slowing down execution significantly.