Casa6

• 

  Rui Xue <rx.astro@gmail.com> 01 Apr 2026 6bf1932bdfc37ed6827bfc9817de8b6fd56ffd05

  CASA-14759: skip redundant normalizeprimarybeam() for cube+standard
  For the standard gridder with specmode=cube, each worker in
  CubeMajorCycleAlgorithm::task() already normalizes the primary beam
  per-subcube during PSF making and writes the result back to the full
  image.  The subsequent master-side normalizeprimarybeam() loop over all
  (pol x chan) planes was therefore redundant and, for a 7500-channel
  8000x8000 cube, accounted for ~31 minutes of wall time after
  "Time for making PSF and PB".
  
  Changes:
  - Extract the cube+standard guard into isCubeStandard bool for clarity.
  - Skip the normalizeprimarybeam() loop when isCubeStandard is True.
  - makePBCore() is unchanged and still skipped for cube+standard as before.
  - Add a timing log entry "***Time for normalizeprimarybeam: <s> (skipped=<bool>)"
    at INFO3 so the optimisation is observable in tclean logs.
  
  This path is safe to skip only for standard+cube because mosaicft and
  awproject gridders derive PB from sqrt(weight)/pbmax and require the
  fully-assembled weight image, which is only available on the master
  after all subcubes have been written back.

  • casatasks/src/private/imagerhelpers/imager_base.py (version 6bf1932bdfc37ed6827bfc9817de8b6fd56ffd05) (diffs)