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lpad and rpad are most commonly invoked with scalar list (and fill, if supplied) arguments. We can specialize for that case to significantly outperform the general-purpose implementation.
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neilconway commentedon Mar 2, 2026
take
perf: Optimize `lpad()`, `rpad()` for scalar args (#20657)
perf: Optimize `lpad()`, `rpad()` for scalar args (apache#20657)
perf: Optimize `lpad()`, `rpad()` for scalar args (apache#20657)