How can I tell if a page (or an asset) is a cache hit?

If you are unsure whether a page or an image is being served into your browser from’s global cache, an easy way to investigate is to:

  1. Open your browser’s dev tools (press f12 on Chrome)

  2. Click on the network tab of the browser tools

  3. Navigate to the page you are interested in viewing.

  4. You should see the network tab start showing the assets coming into the browser.

  5. Click on one of the assets (in the case below we have clicked on the HTML document which is the first to arrive in the browser.

  6. View the response header to see if is reporting a hit or a miss. In the case below we see a hit.

  7. You can also see the ID for the request so you can track this request in your logs for immediate diagnostics.