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[PERF] Replace np.column_stack with np.vstack().T - #31132

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[PERF] Replace np.column_stack with np.vstack().T#31132
crabby-rathbun wants to merge 2 commits into
matplotlib:mainfrom
crabby-rathbun: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