On 7/26/13 12:58 PM, Andreas Gal wrote:
If I remember correctly, the average user has 500 passwords. Thats not a
big deal compressed. Bookmarks is 500-ish as well. History 5000-ish.
Passwords are more like 5-50, at least based on one Test Pilot study:
http://monica-at-mozilla.blogspot.com/2013/02/cant-live-with-them-cant-live-without.html
~500 bookmarks is about in the right ballpark (at least looking at other
old Test Pilot data:
https://testpilot.mozillalabs.com/testcases/a-week-life/results.html).
I can't recall having seen any data about history sizes. I seem to have
~28,000 history entries, FWIW.
I suppose this raises the question -- do we have enough data to
understand what we're designing for? Has anyone gathered / summarized
the various bits of data that we do have?
Ditto for data on _changes_ and _access_ to data. "500 bookmarks" is a
number relevant for disk space and new-device sync. Presumably it then
changes slowly, but what's the rate for history changes? How often are
older history entries used from the awesomebar, and how much fresh data
is needed to keep it useful? [This all becomes especially relevant when
the user turns on a device that hasn't sync'd for a while.]
Finally, I'd note that an "average" number isn't really what we should
design to, but rather the number that covers most usage (95%? 98%?
99.99%?). Or flipped around, what percentage of users are we ok with
leaving behind because their usage exceeds what we designed for (5%? 2%?
0.01%?)? [Of course it's more complex than that, because adding 1
bookmark won't make sync suddenly fall over. One hopes.]
Justin
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