https://bz.apache.org/bugzilla/show_bug.cgi?id=59734

            Bug ID: 59734
           Summary: Named range creation & lookup are linear in the number
                    of ranges
           Product: POI
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: XSSF
          Assignee: dev@poi.apache.org
          Reporter: dtn-asfb...@corefiling.co.uk

XSSFName.setNameName and XSSFWorkbook.getName both involve a linear iteration
through all names already in the workbook. This is a major performance
bottleneck for an application creating lots of named ranges.

I'll shortly attach a suggested patch which does the obvious thing and adds a
map to do fast lookup.

I'll also propose deprecating the methods on Workbook which operate in an
index-based manner and replacing them with ones based on names.

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