Externals parsing optimisation -- waste memory, not execution time. Suggested by: danielsh
Externals parsing optimisation -- waste memory, not execution time.
Suggested by: danielsh

* subversion/libsvn_wc/externals.c (svn_wc_parse_externals_description3):
   Don't iterate the list to check for duplicates, use a hash table.



git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1411268 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion