On Feb 27, 2013, at 11:28 AM, Tony Parker <anthony.par...@apple.com> wrote:
> Out of curiosity, what do you expect to happen if your string is @“ab” or > something even longer, but repeated 1 million times? Your test implies that > the answer is 2,000,000 but in fact the answer is that it only grows one more > byte. The string is being de-duplicated but there is overhead associated with > each object in the archive. The amount seems egregious for an object that is > so small, (a string with one character), but real world archives are rarely > 1-character strings repeated 1 million times. Could the overhead be improved? > Probably, but there are many tradeoffs to make. Also, this kind of repetition collapses down to nearly nothing when compressed with any generic data-compression algorithm like ZIP. Most popular data formats have a lot of strictly-not-necessary repetition in them (view source on any web page and count how many times the string “div” or “href” appears!), but if size is an issue it’s generally a better idea to pipe them through compression, as HTTP can, rather than go to a lot of trouble in the codec to eliminate redundancy. —Jens _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
