Site Performance
WordPress.com’s full-stack performance features keep your site running quickly and reliably, whether you have 10 visitors or 10 million. Two key features that power this performance are Global Edge Caching and the Site Accelerator CDN.
Global Edge Caching uses a network of 28+ data centers across six continents to distribute a static version of your site worldwide. This means visitors access your content from a server closer to their location, reducing load times and improving speed. This feature is included with every WordPress.com plan and has no bandwidth limits.
The Site Accelerator CDN boosts performance by offloading image and static file delivery and reducing strain on your main server. It automatically resizes images and serves them from our optimized network, helping pages load faster while lowering overall server load and bandwidth usage.
To learn more about these features, along with other performance tools available on WordPress.com, explore the guides below.
Global Edge Cache
WordPress.com’s Global Edge Cache makes your site load faster for visitors around the world by taking advantage of our global network of data centers.
Site Accelerator CDN
Site Accelerator from Jetpack is our Content Delivery Network (CDN), optimized to speed up your site by delivering faster images and static files.
Defensive Mode
WordPress.com includes a built-in Defensive Mode to help protect your site from spam bots and DDoS attacks. It runs on our global edge network but can also be used separately from the Global Edge Cache if needed.
Downtime Monitoring
Downtime Monitoring on WordPress.com continuously watches your website and alerts you the moment that downtime is detected.
Speed Test Tool
The Speed Test Tool helps you quickly find what’s slowing down your site by measuring key performance metrics like load time, interactivity, and visual stability (Core Web Vitals). It also gives clear recommendations to help you improve your site’s speed and overall user experience.
Last updated: June 12, 2025