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Caching warnings are completely wrong
10-01-2020, 06:35 AM
Post: #1
Caching warnings are completely wrong
I've been running some tests and keep getting a low score for "cache static content". When I look at the details it shows several images as only being cached for a few days (3.1 days, 2.6 days, etc).

Here's one example: https://webpagetest.org/performance_opti...ic_content

But those images are all cached for a long time. Checking the Response headers on the waterfall chart shows my correct setting of 30 days:

Quote:cache-control: public, max-age=2592000

I also double checked on other tools and the caching is fine. Is there something wrong with WPT? Or is there some other reason it thinks the caching is so short?
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10-06-2020, 04:37 AM
Post: #2
RE: Caching warnings are completely wrong
I think it's subtracting the value of the Age header from Cache-control's max-age. I don't think that's correct - afaik, Age just tells you how long the proxy (Cloudflare in this case) has had it cached already - nothing to do with the how long the browser will cache it. But I could be wrong.
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