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?
> On Tue, Aug 23, 2016 at 3:48 PM, Volker Eckl <volker(a)wikimedia.org
>> 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
>>> FYI after much experimentation, research and testing the mobile site has
>>> been lazy loading images  since Thursday 18th August. This means if you
>>> do not see an image you will not download it. We have taken care to ensure
>>> 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  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).
>>>  https://www.mediawiki.org/wiki/Reading/Web/Projects/Performa
>>>  https://www.mediawiki.org/wiki/Reading/Web/Lazy_loading_
>>>  https://whatdoesmysitecost.com/
>>> Mobile-l mailing list
>> Mobile-l mailing list
I would like to draw your attention to ticket
This ticket highlights some issues with the way sections, headers and the
TOC are handled in the parser in combination with tag extensions and parser
Basically the problem is that the TOC is created before strip markers are
substituted, which prevents some sections from showing up in the TOC.
This issue is limiting the usefulness of such constructs, so I am very
interested to spend some time on it with people well-versed in the parser
code and in particular the formatHeadings function.
Of course, there are plenty more details I could give but before flooding
wikitech-l with those I thought I'd poll for the interest in addressing
this. Maybe the next step could be some chat over IRC or another medium?
Thanks in advance,
Can you tell me how to find out if Wikipedia has changed something about how pages are served? In particular, what's changed about how images are served, whether the server is using a new SSL certificate, and whether the server's support for OCSP has changed?
As of 10 August 2016, when I try to view Wikipedia pages with the browser on a Nook Tablet, the page never stops loading, the browser is hung, I have to reboot the tablet to try anything else.
I requested help on my (JMichael_ll) Talk page. I was advised to try WP:VPT. I reposted there. I think that's still not the best place to ask. When I sent mail to info-en(a)wikimedia.org, I was advised to try here.
I would like to give everyone advance notice of a pending security release
for all supported branches. The release will come out on Monday, August
22nd. There are several security fixes for core and one extension that will
included in this release, along with the normal backports that have made it
into the branches already.
The version numbers will be:
Please let me know if you have any other questions. Thanks and have a
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