Eliot,

Glad to hear this clarified things. We're hoping that this post to
chromium-extensions will be enough (we've been posting a lot on the chromium
blog these past days), but if we see continued confusion beyond the group,
this is definitely something we'll consider.

Cheers,

-Nick

On Tue, Dec 15, 2009 at 9:48 PM, Eliot <[email protected]> wrote:

> Thanks for the info, Carl. This helps clarify what me and some of my
> fellow developers have been seeing in the Chrome Extension repository.
> Perhaps this could go in one of the Google Blogs (e.g. the Chrome or
> Chromium blog)?
>
>
> On Dec 15, 8:51 pm, Carl Nygaard <[email protected]> wrote:
> > Google Chrome Extensions Developers,
> >
> > Many of you have probably noticed that user counts have fallen across
> > the gallery. There are a couple of reasons for this:
> >   * The user count is computed based on update requests in the last 7
> > days. Many users tried several extensions on the first day then
> > uninstalled those they didn't use. Their update requests no longer
> > fall into the 7-day window.
> >   * Because user counts are computed from update requests, they lag a
> > bit behind installs (Google Chrome checks for extension updates every
> > 5 hours or so). To avoid install counts larger than the user counts,
> > we decided to add install counts to the update counts for the first
> > few days (in retrospect, just using the install count would have been
> > more accurate). Now that we're a week in, we don't need to do this
> > trick any more, so we're going back to just update counts.
> >
> > Going forward, the stats are computed as follows:
> >   * users: This is the number of users that checked for updates in the
> > past week. For example if we update the statistics on Wednesday, then
> > the value you see is the number of users that checked for updates
> > since 12:00 am PST on the previous Thursday.
> >   * weekly installs: The number of installs performed in the past
> > week.
> >
> > Additional details about the statistics:
> >   * If a user uninstalls an extension before Google Chrome checks for
> > updates to extensions, then the user will not be included in the
> > "users" count, although they should still be counted in the "weekly
> > installs" count.
> > If the same user performs two installs, they will only be counted
> > once.
> >   * We currently update the counts once a day, but we're experimenting
> > with more frequent updates, so you may see the numbers change
> > throughout the day.
> >   * In the future, we are hoping to give developers access to even
> > more detailed statistics about their extensions.
> >
> > As always, we will continue to tweak our stats processing algorithms
> > to give you accurate and useful data. Let me know if you have any
> > questions!
> >
> > Thanks,
> > Carl
>
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