PETSc version 3.16.5
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# PetscOptionsPopGetViewerOff

reset whether PetscOptionsGetViewer returns a viewer.

### Synopsis

    #include "petscviewer.h"
    PetscErrorCode  PetscOptionsPopGetViewerOff(void)

Logically Collective

### Notes

Calling XXXViewFromOptions in an inner loop can be very expensive. This can appear, for example, when using many small subsolves. Call this function to control viewer creation in PetscOptionsGetViewer, thus removing the expensive XXXViewFromOptions calls.

### See Also

PetscOptionsGetViewer(), PetscOptionsPushGetViewerOff()

### Level

developer

### Location

src/sys/classes/viewer/interface/viewreg.c
Index of all Viewer routines
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Index of all manual pages