[webkit-dev] support for navigator.cores or navigator.hardwareConcurrency

Rik Cabanier cabanier at gmail.com
Mon May 5 18:13:28 PDT 2014

On Mon, May 5, 2014 at 5:52 PM, Simon Fraser <simon.fraser at apple.com> wrote:

> It allows attackers to know even more about my system, exposing more data
> for fingerprinting.

People can already approximate this today. Approximations are fuzzy so this
might hurt performance if you're not a popular platform or change how the
browser implements workers.

> Do you really want a page to know that you have a  fancy-pants 24-core Mac
> Pro rather than a little Mac mini?

If I have 24 cores ready to do work and the page can put them to use, I
would like it to do so.
At the same time, if I just have a old mac mini, I don't want the page to
launch 24 workers as that will exhaust my memory and cause contention.

> On May 5, 2014, at 4:58 PM, Filip Pizlo <fpizlo at apple.com> wrote:
> I like this.  Personally, I don't see any downside.
> Is there a bug (on bugs.webkit.org), and if not, can you create one? :-)
> -Phil
> On May 5, 2014 at 4:49:35 PM, Rik Cabanier (cabanier at gmail.com) wrote:
> All,
> there's a thread on blink-dev [1] and whatwg [2] to create a new parameter
> on the navigator object that returns the maximum number of tasks that can
> run in parallel. [3]
> Is this something that WebKit would support?
> 1:
> https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/B6pQClqfCp4
> 2:
> http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2014-May/254200.html
> 3: http://wiki.whatwg.org/wiki/NavigatorCores
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