Lazy load

[jonathanstegall]

We need a new way to do lazy loading of images. The Easy Lazy Loader caused the database to crash. It overloaded the server with these queries:

SELECT post_id FROM wp_postmeta WHERE meta_value='https://www.minnpost.com/sites/default/files/image

SELECT post_id FROM wp_postmeta WHERE meta_value='https://oasc17.247realmedia.com/RealMedia/ads/adst

[jonathanstegall]

It seems like the IntersectionObserver API is the way to go, with a polyfill, both because Google prefers it and because it seems to be an emerging standard.

[jonathanstegall]

Apparently the Financial Times does lazy loading using IntersectionObserver. They have some documentation about how they manage ads, but it's unclear how useful it would be for us.

Their ad framework (using DFP) is called oAds

[jonathanstegall]

I think we have a good solution for this now. The next step is to test it on dev/stage before the ad people decide when they'd like to enable it.

https://github.com/MinnPost/appnexus-acm-provider/releases/tag/0.0.19

[jonathanstegall]

Planning to do an initial test with this plugin for a full day of data on 11/17/18

[jonathanstegall]

Things that have been tested on the live server and appear to work as they should:

• [x] embed ads
• [x] images attached to posts
• [x] images in post_content
• [x] iframes

[jonathanstegall]

This is running for embed ads on the live server as of 1/8/19.

[jonathanstegall]

This is all running on the live server as of 3/4/19. We should watch and make sure nothing goes wrong for a bit.

[jonathanstegall]

I can't remember why this broke, but it was turned off for non-ads. I finally turned on the included-with-host Jetpack lazy load setting for images in general on 1/10/20. It seems to be working fine. Going to close this for now.