[webkit-dev] Removing the prefix from webkitPostMessage

Maciej Stachowiak mjs at apple.com
Wed Sep 12 23:00:59 PDT 2012

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> wrote:
> - 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 well, 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 URLs 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 for Chromium to gather in the wild.

That's about what the equivalent Safari mechanism does too. What it can tell 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 won't tell you what sites it is on or whether it's critical.


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