W3C home > Mailing lists > Public > public-respimg@w3.org > September 2013

Re: Compressive images test

From: Jason Grigsby <jason@cloudfour.com>
Date: Fri, 13 Sep 2013 09:40:05 -0700
Message-ID: <CADQU=pONtnT0u92KT2qvKR16DNkO+uuCTB185RucdE-q_V5KSQ@mail.gmail.com>
To: Ben Callahan <ben@heysparkbox.com>
Cc: "public-respimg@w3.org" <public-respimg@w3.org>
It seems to me that we're looking for a combination of multiple compressive
images on a page using older mobile hardware. And we should have the same
page with standard images as a baseline to compare to.

The challenge I run into is figuring out what is a reasonable number of
compressive images to include. I'm pretty sure that we could manufacture a
page that doesn't work ("Oh hey, we put a hundred compressive images on a
page and it crashed the browser on a Blackberry 5. I guess compressive
images don't work. </shrug>").

But that wouldn't be a fair or realistic test. Ultimately, the only test
that matters is for your page and your content on the devices that you're

However, simply saying that doesn't give us any good sense of where the
trouble spots may be. And more worrisome in my mind is that if compressive
images really do cause problems with older devices and we don't offer any
more guidance than you should check on a project by project basis, that
people will use that as an excuse to ignore the impact on older devices.

So it seems we need some way to define where the edges of the technique
are. Something that says, "If you use a couple on a page, you're good. But
if you have a a dozen on the page, you're going to have problems." Or "Use
it, but make sure you test on device A, B, and C because if there are
issues, those devices are going to be the ones that encounter the problems


On Fri, Sep 13, 2013 at 7:10 AM, Ben Callahan <ben@heysparkbox.com> wrote:

> Not sure exactly what the test structure would look like, but we'd be
> happy to help do this. It's something we've been wondering as well…
> --
> *Ben Callahan
> **Sparkbox, President*
> 123 Webster Street, Studio 2
> Dayton, OH 45402
> 937.401.0915
> www.seesparkbox.com

+1 (503) 290-1090 o | +1 (503) 502-7211 m | http://cloudfour.com
Received on Friday, 13 September 2013 16:40:56 UTC

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