[webkit-dev] Huge improvement in Safari results on wpt.fyi

[Philip Jägenstedt]

Hi WebKittens,

Fresh off the bots, I'm excited to report more robust Safari results,
and that Safari WPT pass rates are clearly improving! Thanks to the
hard work of Mike Pennisi [1] we now have the first Safari 12 results:
https://wpt.fyi/results/?sha=ee2e69bfb1&product=safari-12.0

This uses the same setup as for Safari Technology Preview, which has
been running for a while [2] and are the results you see on the
"experimental" view:
https://wpt.fyi/results/?label=experimental

This appears much more robust than the Safari 11 data we've collected
from Sauce Labs, and we can see a massive improvement between Safari
11 and 12:
https://wpt.fyi/results/?sha=ee2e69bfb1&product=safari-11.1&product=safari-12.0&diff

This lumps together infrastructure improvements as well as Safari
11->12 improvements, but improvements in service-workers/ [3] stands
out, as well as in webdriver/, referrer-policy/, css/css-align/, and
others. (The effect of moving away from Sauce is mainly less
timeouts.)

Also very interesting is to compare Safari 12 stable to TP:
https://wpt.fyi/results/?sha=ee2e69bfb1&product=safari-12.0&product=safari-12.1&diff

One can tell that work is going in canvas-related things,
web-animations/, css/css-logical/ and more! \o/

I hope you'll all find these results valuable, and please report bugs
or feature requests here:
https://github.com/web-platform-tests/wpt.fyi/issues

P.S. We're also trying to use use these diff views to spot
regressions. It's a bit hard to use, [4] but a fix in in progress [5]
and I might check back here when that works. I'll append to the end of
this email a non-exhaustive list of possible regressions already
possible to spot.

[1] https://github.com/web-platform-tests/results-collection/issues/604
[2] https://wpt.fyi/test-runs?labels=safari,experimental
[3] https://wpt.fyi/results/service-workers?sha=ee2e69bfb1&product=safari-11.1&product=safari-12.0&diff=true
[4] https://github.com/web-platform-tests/wpt.fyi/issues/411
[5] https://github.com/web-platform-tests/wpt.fyi/pull/609

P.P.S. Possible regressions in Safari TP:
https://wpt.fyi/results/css/vendor-imports/mozilla/mozilla-central-reftests/shapes1?sha=ee2e69bfb1&product=safari-12.0&product=safari-12.1
https://wpt.fyi/results/service-workers/service-worker/extendable-event-async-waituntil.https.html?sha=ee2e69bfb1&product=safari-12.0&product=safari-12.1
https://wpt.fyi/results/service-workers/service-worker/skip-waiting-installed.https.html?sha=ee2e69bfb1&product=safari-12.0&product=safari-12.1