Serving efficiently.
WHAT CACHING ACHIEVES
Repeat visits transferring almost nothing.
WHAT TO SET
Long durations for assets, with versioned filenames Short or no caching for documents that change
WHY VERSIONED FILENAMES
The content at an address never changes, so it can be cached indefinitely, and a change creates a new address.
WHAT THAT SOLVES
Updates appearing immediately, without disabling caching.
WHAT COMPRESSION ACHIEVES
Substantially smaller transfers for text-based content.
WHAT TO ENABLE
Compression on the server, for markup, styles, scripts and data.
WHAT NOT TO COMPRESS
Images and media, which are already compressed.
WHAT A DELIVERY NETWORK PROVIDES
Serving from closer to the visitor, reducing latency.
WHAT IT DOES NOT PROVIDE
Faster generation of dynamic content.
WHAT MATTERS FOR LOCAL VISITORS
A server near them, or a delivery network with a presence near them.
WHAT TO CHECK
That caching headers are actually being sent.
HOW
The network panel, which shows the headers on every response.
