String Handling in Formula Compiler
From Apache OpenOffice Wiki
Compiling formulas almost unconditionally calls toUpper() on every token parsed and spends way too much time in the underlying i18n routines.
- No need to do this at all for tokens of operators, separators, parentheses, ... all tokens that do not involve letters.
- When loading ODF documents, only a simplified ASCII toUpper() needs to be called, since all function names are stored using English names.
