thibautdelille

WordPress can be sometimes slow and make a lot of call to the database when you want to display a lot of posts with featured images in on beautifull long scrolling page. I a case like that you need to hit the database to get the featured image of every post.
JSON Cache fix this issue. it allow you to generate a json file that content all the informations of a post so the user when visiting your site just need to open the json file.

JSON Cache Plugin

A Wordpress plugin to generate JSON file from a wordpress database.

David Shanske

Daniel Jalkut (Red Sweater)

mantonr

Adds a JSON Feed to your WordPress site by adding <code>/feed/json</code> to any URL.
The JSON Feed format is a pragmatic syndication format, like RSS and Atom, but with one big difference: it’s JSON instead of XML. Learn more at <a href="http://jsonfeed.org/" rel="nofollow ugc">jsonfeed.org</a>.

JSON Feed (jsonfeed.org)

This plugin is simple to install, adds no weight to your site, and does what it says on the tin.

JSON Cache Plugin vs JSON Feed (jsonfeed.org)