Are you getting all of the posts as a single JSON object? It might also speed things up to make multiple small requests to the API (one per post) and handle it asynchronously. That wouldn't be something you could do quickly, though.

Also maybe don't even call linkify.js until an item loads (you can set custom event handlers for dynamically generated elements in jQuery[0]) - I don't know if you're already doing this or not.

Fewer posts per page would probably help too.

[0]https://stackoverflow.com/questions/12065329/jquery-adding-e...