Performance & Speed - DevtonicStudios

FilterKit Pro is fast out of the box. Most stores will not need to touch these settings. But if you have 5,000 or more products, a few tweaks help. Go to WooCommerce, Settings, FilterKit Pro, Advanced.

What’s Already Built In:

Smart Loading: Only loads code for features you have turned on. Features that are off add zero page weight.
Built-In Caching: Filter counts are cached and only recalculated when products change.
Click Throttling: 5 filter clicks in 1 second? Only the last one is processed. Prevents server overload.
Page Builder Detection: Only loads code for the builder you use, not all 8.

For Large Stores (5,000+ Products):

Turn On Variation Cache: Pre-calculates size/color combinations for instant lookups. Click “Build Cache” once, it auto-refreshes when products change.
Turn On Product Index: Creates a dedicated lookup table. Noticeably faster on large catalogs.
Adjust Cache Duration: Default: 1 hour. Lower it if inventory changes often, increase to 24 hours if products rarely change.

Caching Plugin Compatibility:

Works with WP Rocket, LiteSpeed Cache, W3 Total Cache, and most others. If filtered results look stale, add this to your caching plugin’s exclusion list:

/?wc-ajax=filterkit_*