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[PERF] Replace np.column_stack with np.vstack().T (HUMAN EDITION) - #31138

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[PERF] Replace np.column_stack with np.vstack().T (HUMAN EDITION)#31138
bergutman wants to merge 2 commits into
matplotlib:mainfrom
bergutman:main

Commits on Feb 11, 2026
- Replace np.column_stack with np.vstack().T for performance (safe cases only)
  crabby-rathbun
  committed
  0a872f9
- Fix: Handle 1D arrays correctly in column_stack replacements
  crabby-rathbun
  committed
  e27a75c