[webkit-dev] Supporting <link rel=> for finding ref tests

[Frédéric Wang]

On 09/11/2019 04:02, Ryosuke Niwa wrote:
>
>>>>   - Requires us modifying each port's DRT to support this format
>>>>
>>>> No, it just requires webkitpy hacking which I've done in the patch.
>>> I'm not certain writing a bunch of regular expressions in webkitpy is
>>> a reliable mechanism to find expected results. Another issue I found
>>> back then was that it significantly slowed run-webkit-tests' startup
>>> time because WPT has a workflow to find all tests & their expected
>>> results upfront before any tests could run.
>> The patch uses html5lib (via BeautifulSoup), which is exactly what WPT, and our importer use to find the ref tests.
>>
>> We don't find references up-front; only when running each test. This patch does add some overhead for parsing each test file,
>> which I measured to be about 1-2 sec on a directory which took 30s to run. I think this slight slowdown is worthwhile (we could
>> probably eliminate it with some webkitpy optimizations).
> Hm... that's ~3% overhead.

@Simon: I agree with Ryosuke that 3% sounds big. IIUC you are parsing
the HTML file when running each test? I thought that there is a
MANIFEST.json file which is supposed to cache that information, why
can't we use it?

-- 
Frédéric Wang