perf: optimize JVM CometColumnarToRow for complex types [experimental]#3213

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andygrove:perf/optimize-complex-type-codegen

Commits on Jan 16, 2026

fix
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Commits on Jan 18, 2026

perf: [WIP] optimize CometColumnarToRow for complex types

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perf: add reusable wrapper objects to eliminate per-row allocation

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perf: add reusable row wrapper for StructType columns

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fix: add getVariant() method for Spark 4.x compatibility

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fix: move CometColumnarArray and CometColumnarRow to version-specific dirs

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perf: add direct memory access for fixed-width primitives

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perf: add wrapper pooling for nested complex types

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Revert "perf: add wrapper pooling for nested complex types"
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