https://www.webpagetest.org/easy will run a LH analysis if you ask it to (bottom checkbox, "Run Lighthouse Audit"):pic.twitter.com/YDzlvAlWAF
Chrome Project
& Web Standards TL; Blink API OWNER
Named PWAs w/ @phae; probably making her
DMs open. Tweets my own; press@google.com for official comms.
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| Country | Code | For customers of |
|---|---|---|
| United States | 40404 | (any) |
| Canada | 21212 | (any) |
| United Kingdom | 86444 | Vodafone, Orange, 3, O2 |
| Brazil | 40404 | Nextel, TIM |
| Haiti | 40404 | Digicel, Voila |
| Ireland | 51210 | Vodafone, O2 |
| India | 53000 | Bharti Airtel, Videocon, Reliance |
| Indonesia | 89887 | AXIS, 3, Telkomsel, Indosat, XL Axiata |
| Italy | 4880804 | Wind |
| 3424486444 | Vodafone | |
| » See SMS short codes for other countries | ||
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https://www.webpagetest.org/easy will run a LH analysis if you ask it to (bottom checkbox, "Run Lighthouse Audit"):pic.twitter.com/YDzlvAlWAF
As this thread started about Gatsby, here's a public-sector site built on this stack, running through WPT/easy in this config: https://www.webpagetest.org/result/190829_F7_a00e889c76d1c198ec401361ec901904/ …
What's different about this run vs. opening up devtools locally is:
1.) the location in the network (this is in a rack in Dulles, VA thanks to the generosity of @patmeenan)
2.) the quality of the network emulation. WPT uses dummynet: https://github.com/WPO-Foundation/wptagent#traffic-shaping-options-defaults-to-host-based …
3.) the hardware
Specifically, WPT drives Chrome in this config on a *real MotoG4*: https://www.gsmarena.com/motorola_moto_g4-8103.php …
Here's the resulting LH report: https://www.webpagetest.org/lighthouse.php?test=190829_F7_a00e889c76d1c198ec401361ec901904&run=3 …
WPT also gives you the timeline paired with screenshots and video. If you click "filmstrip view" here on one of the test runs: https://www.webpagetest.org/result/190829_F7_a00e889c76d1c198ec401361ec901904/ … You can see the scrubbable waterfall: https://www.webpagetest.org/video/compare.php?tests=190829_F7_a00e889c76d1c198ec401361ec901904-r%3A3-c%3A0&thumbSize=200&ival=100&end=full …
...and generate video: https://www.webpagetest.org/video/view.php?id=190829_543b6196144502098b95ce61e61eec1f17f5d3ea …
Ah, so LH is really just a small piece of the puzzle. You could run it locally and everything looks great. But WPT shows you what it's like to load the app on a real phone + network. That's very interesting.
Exactly. LH is trying it's level best when run via devtools to emulate things without being super invasive; we could do a better job of network conditioning if we actually installed a driver and slowed things to a crawl while testing, e.g.
The throttling you see today is more along the lines of "what can we do that only affects this single renderer process"? Remember that Chrome is actually multi-process. Networking actually happens *in the browser process*.
The LH team understands the fidelity gap and is working to close it. But until further notice, I strongly recommend WPT/easy
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