[webkit-dev] Removing the prefix from webkitPostMessage
ojan at chromium.org
Thu Sep 13 12:10:28 PDT 2012
On Thu, Sep 13, 2012 at 12:06 PM, Dirk Pranke <dpranke at chromium.org> wrote:
> On Wed, Sep 12, 2012 at 11:00 PM, Maciej Stachowiak <mjs at apple.com> wrote:
> > On Sep 12, 2012, at 10:36 PM, Ojan Vafai <ojan at chromium.org> wrote:
> > On Wed, Sep 12, 2012 at 6:40 PM, Maciej Stachowiak <mjs at apple.com>
> >> - Is this approach substantially less time and effort than adding a
> >> histogram-style metric? I expect you have added a histogram to Chrome at
> >> some point, and so can comment on the relative difficulty and time to
> >> produce an answer.
> >> (BTW we have the capability to do this type of thing in Safari as
> >> and it is what I ask Apple engineers to do when they want to remove a
> >> feature, even a purely Mac-specific one.)
> > FWIW, histograms can only tell you a percentile. We never report back
> > due to privacy concerns. So, it's somewhat underpowered compared to
> > experimentally removing a feature and seeing what sites break. I'm not
> > saying that's not a useful signal, just clarifying what data is possible
> > Chromium to gather in the wild.
> > That's about what the equivalent Safari mechanism does too. What it can
> > you is stuff like "feature x is used very little by sites users actually
> > visit" without risk of breakage. But if there is significant use, it
> > tell you what sites it is on or whether it's critical.
> Technically we can build histograms that either give you a percentage
> of sites or a percentage of page views without compromising privacy
> overly. The combination of the two is a pretty good approximation of
> It would be interesting to build a generic mechanism for monitoring
> prefixed APIs ... I wonder how hard that would be.
FWIW, Tab has adding roughly this for prefixed CSS properties. Not sure
what the status of that is, but the code has been committed AFAIK.
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