Caching Score: https://stepbrobd.com/assets/static/img/home-1.avif

What is this check, and why should you care

The time that it takes for a user's browser to receive the first byte of page content.

The lower the TTFB, the faster your site will be perceived by the end user.

To get maximum points, your TTFB must be less than or equal to 30ms. If your TTFB is more than 1 second then you get no points here.

Maximum possible points

50

What is this check, and why should you care

Using a caching proxy is extremely useful for caching purposes.

Maximum possible points

50

What is this check, and why should you care

Using a CDN is extremely useful for caching purposes.

Maximum possible points

50

What is this check, and why should you care

An ETag is an opaque identifier for a specific version of a resource, defined in RFC 9110 §8.8.3. When a client revisits a URL it can send the previously-seen value back in an If-None-Match request header (RFC 9110 §13.1.2); if the server still considers the response current it returns an empty 304 Not Modified instead of the full body, saving bandwidth and origin work.

No ETag header was found in the response.

See the Wikipedia page on ETag for more background.

To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.

Maximum possible points

30

What is this check, and why should you care

The Last-Modified response header carries the date the resource was last changed, defined in RFC 9110 §8.8.2. When a client revisits the URL it can send the previously-seen value back in an If-Modified-Since request header (RFC 9110 §13.1.3); if the resource has not changed the server returns an empty 304 Not Modified instead of the full body, saving bandwidth and origin work.

No Last-Modified header was found in the response.

Maximum possible points

30