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I have been trying to optimise page speed and particularly the way images are served and cached on this specific page: www.modemio.de/damen-mokassins

here is the outcome: screenshot Google PageSpeed

PageSpeed tool says the specific image is being cached only for 15 minutes. If I go on the page itself and explore the header response for the specific image I see:

cache-control: private, no-transform, max-age=2592000

Chrome Dev Tool

Quote:

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

this is exactly what´s happening on my browser but I don´t understand why the PageSpeed tool sees only 15 minute caching. Can anyone shed some light?

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Shahin Ghannadian
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  • Same issue here. I changed `cache-control` on nginx, I could see it when testing from my own browser, but PSI took a few days to show the new value :-/ very annoying I never knew why it took so long. No CDN or anything else in the middle. – maganap Mar 19 '20 at 08:29

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