Articles

PHP version, OPcache, PHP-FPM workers and profiling: how to make WordPress spend less time on the server before the page is sent.

Is the database making your WordPress site slow? How to find the heavy queries and fix them with indexes, cleanup and caching.

Shared, managed, VPS or cloud? How to choose WordPress hosting that fits your website or online store, and what to check first.

What happens between a visitor clicking and WordPress sending the page? We follow one request through the server, PHP, hooks, the database and the cac...

What is the difference between SSL, TLS and HTTPS? How the encryption works, how to choose a certificate, and how to set up HTTPS properly on WordPres...

A function in a filter plugin spent 100 ms building JSON. How we found it in New Relic, why the code looked the way it did, and how we got it under 1 ...

How DNS and name servers work: the key DNS records, TTL, email security with SPF, DKIM and DMARC, and what to do when you switch hosting.

How IP addresses work: IPv4, subnet masks and CIDR with a worked example, private addresses and NAT, IPv6, and how IP fits together with MAC addresses...