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Optimize partition - #25154

Draft

res-life wants to merge 7 commits into

NVIDIA:mainfrom

res-life:perf/partition-combined-cpu-plans

Draft

Optimize partition#25154
res-life wants to merge 7 commits into
NVIDIA:mainfrom
res-life:perf/partition-combined-cpu-plans

Commits on Nov 4, 2026
- Combine partition plans with fused STRING materialization
  res-life
  committed
  46e8c87
- Balance STRING copy work and shorten recompute register lifetimes
  res-life
  committed
  3544566
Commits on Nov 6, 2026
- Improve CPU-selected partition materialization on L4
  res-life
  committed
  b0aad85
- Use cuda::std::popcount in partition map plans
  res-life
  committed
  379322b
- Validate large fixed-width partition plans with a host oracle
  res-life
  committed
  eac9bee
- Cover single-column sparse string partition copies
  res-life
  committed
  8c93537
- Address partitioning review suggestions
  res-life
  committed
  c285951