On Nov 13, 2012, at 4:01 PM, Dirk Pranke <dpra...@chromium.org> wrote:

> It turns out that we have a reasonably large number of tests that produce the 
> exact same pixel results. On chromium-mac on 10.8, for example, there are 
> 2048 tests that share a result with some other test. 50 of them, for example, 
> draw a green square in the upper left corner of the page (e.g., for 
> svg/custom/root-element.html).

It seems to me that when we find a pattern like this, we should create a 
hand-coded reference test result. The fact that so many tests produce the same 
pixels means that each reference can be used to move a lot of tests from the 
pixel test to the reference test category.

I don’t think we need to do that <iframe> thing you said, as long as there are 
large sets of tests with the same result, since if the payoff for each 
reference is big enough, it should be affordable to hand-write the reference 
file.

-- Darin
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