Super Speedy Listings Add-on

On a large site, archive pages get expensive. Author archives, taxonomy and category archives, and filtered listings all have to work out which posts belong where, and by default that means large joins against wp_term_relationships and wp_posts. On a site with millions of rows those joins are slow, and they’re slow every time the page loads.

Super Speedy Listings, formerly Super Speedy Term Relationships, is an optional add-on for Scalability Pro. It maintains a pre-computed lookup table, an "object ancestors" table, that maps posts to their terms directly. Instead of resolving an archive through large joins at request time, the query reads from a single indexed table. That turns a heavy join into a fast, indexed lookup.

It installs as an add-on of Scalability Pro, or of Super Speedy Filters, and adds a "Listings" settings tab. Once installed it builds its table in the background, so there’s nothing to sit and wait for. If you ever need to rebuild it, for example after a large data change, you can do that from the Listings tab or via WP-CLI.

This is aimed at very large sites with heavy author, taxonomy or filtered archive traffic. If those pages are a meaningful part of your traffic and the joins behind them are showing up as slow, this is what fixes it. Smaller sites won’t see the same benefit, because their joins are cheap enough already. Super Speedy Listings is available to download for customers with an active licence.

In short: archive and filtered listing pages are slow on large sites because they join wp_term_relationships against wp_posts on every load. Super Speedy Listings maintains a pre-computed object ancestors table so those pages resolve from one indexed table instead. It adds a Listings tab, builds in the background, and is best suited to very large sites with heavy archive traffic.