This is so rad, congratulations! I know this has been years in the making -
it's really awesome to see it working :D
On Tue, Aug 23, 2016 at 5:11 PM Adam Baso <abaso(a)wikimedia.org> wrote:
Good question - the code tries to fetch the images
ahead of them coming
into the viewport. That can mean upon section expansion, as well.
On Tuesday, August 23, 2016, Justin Ormont <justin.ormont(a)gmail.com>
wrote:
This sounds great. Are the images pre-loaded when
the user gets close, or
once it's scrolled into view?
--justin
On Tue, Aug 23, 2016 at 3:48 PM, Volker Eckl <volker(a)wikimedia.org>
wrote:
Amazing work! Enjoying the further speed
improvements and the detailed
analysis of Japanese Wikipedia testcase.
On Tue, Aug 23, 2016 at 2:20 PM, Jon Robson <jrobson(a)wikimedia.org>
wrote:
FYI after much experimentation, research and
testing the mobile site
has been lazy loading images [1] since Thursday 18th August. This means if
you do not see an image you will not download it. We have taken care to
ensure users without JavaScript can still view images and that most users
will barely notice the difference.
We are currently crunching the data this change has made and we plan to
write a blog post to reporting the results.
In our experiments on Japanese Wikipedia we saw a drop in image bytes
per page view by 54% On the Japanese Japan article bytes shipped to users
dropped from 1.443 MB to 142 kB.
This is pretty huge since bytes equate to money [3] and we expect this
to be significant on wikis where mobile data is more expensive. In a
nutshell Wikipedia mobile is cheaper.
As I said blog post to follow once we have more information, but please
report any bugs you are seeing with the implementation (we have already
found a few thanks to our community of editors).
~Jon
[1]
https://www.mediawiki.org/wiki/Reading/Web/Projects/Performance/Lazy_loadin…
[2]
https://www.mediawiki.org/wiki/Reading/Web/Lazy_loading_of_images_on_Japane…
[3]
https://whatdoesmysitecost.com/
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