How does JSON compare to XML in terms of file size and serialisation/deserialisation time?

Question

I have an application that performs a little slow over the internet due to bandwidth reasons. I have enabled GZip which has improved download time by a significant amout, bu

Answer 1

actually this is harder to answer then it seems,

several years ago json was 'faster' but the differences have become finer between the two.

what I've observed is;

• xml compresses better with gzip then json .. time saved in download can offset other components
• xml parsing/querying in raw js is roughly equiv with json
• xml parsing/querying in jquery is much slower ... I won't begrudge jquery developers to focus on json

overall, tech that speeds up modern browsers also applies to xml processing as well.

generally, whenever I hear json touted as a 'lowfat' alternative to XML I wonder if its not some subliminal obsession with weight issues ... thats on my pessimistic days;

basically the rule of thumb I follow is

markup good for documents json good for data

and move on ... nothing to see here