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How CDNs Work: From Origin to 300 Edge Cities

Follow a single page request as it travels from a visitor's browser to the nearest edge server and back, and learn why cache hierarchies, tiered caching, and origin shields matter for your WordPress site.

by Robbie·Jun 9, 2026·5 min read

PHP Workers: The Quiet Limit on Concurrent Traffic

Every WordPress request has to pass through a PHP worker, and there are only so many to go around. Here is what that limit actually means, how it fails, and how caching lets you serve far more traffic without adding a single worker.

by Robbie·May 23, 2026·5 min read