Closed Bug 1615522 Opened 5 years ago Closed 5 years ago

Lazyloading images makes loading ardmediathek.de slow

Categories

(Core :: DOM: Core & HTML, defect)

Product:
Core
Component:
DOM: Core & HTML
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED INVALID

People

(Reporter: jens1o, Unassigned)

References

(Regression,
URL
)

Details

(Keywords: regression)

STR:

  1. Make dom.image-lazy-loading.enabled set to true (restart if needed)
  2. Navigate to ardmediathek.de and wait until you see all the images for videos to watch.
  3. Set the setting to false and restart
  4. Navigate to ardmediathek.de again and notice that the images load quite faster.

It seems to me it looks the same. Also it looks like the site doesn't set loading="lazy". I guess it's because I am accessing the site from Japan?

URL: ardmediathek.de

Hey Jens, I also couldn't see any differences in loading speed, but then I am checking from Australia ;)

Yeah, also: regardless of the pref, on last build images were lazy loaded due to a bug (https://phabricator.services.mozilla.com/D62723), so not sure how a difference could be observed?

I'm in spain right now but same about loading speed.

Also that seems like custom lazy-load code to me, document.querySelector("[loading=lazy]") returns null

Tried to reproduce this from Germany, but the pictures seem to load equally fast. Both times it felt like a fraction of second. Used current Nightly on Ubuntu 18.04.

I'm sorry, after upgrading to the latest Nightly to make a profile I wasn't able to reproduce it anymore (and now the setting is true by default). Feels bad. :/ Sorry for your wasted time.

Status: NEW → RESOLVED
Closed: 5 years ago
Resolution: --- → INVALID

Jens, no problem at all! That's good to hear. Thanks for the reconfirmation and thanks for using lazy loading immediately after it landed!

Has Regression Range: --- → yes
Keywords: regression
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