Actually, Apple's implementation does handle multiple pair redundancy since all CFArrays and CFDictionarys added to the PList are uniqued. Obviously, further G

Actually, Apple's implementation does handle multiple pair redundancy since all CFArrays and CFDictionarys added to the PList are uniqued. Obviously, further GZIPing the result will always make it more compact but GZIP on uniqued result is likely to result in a more compact representation than GZIP on the non-uniqued result.