privacy-policy Performance Testing Related Topics 
Smashing Magazine
JANUARY 6, 2020
So if two sites point to the exact same third-party resource URL, the code is downloaded once per domain , and the cache is "sandboxed" to that domain due to privacy implications ( thanks, David Calhoun! ). Hence, using a public CDN will not automatically lead to better performance. Testing And Monitoring. ad visibility).
Smashing Magazine
SEPTEMBER 6, 2021
Firewalls can’t just use the QUIC CIDs, because they also change over time to protect users’ privacy! Even then, however, validating protocol performance with the current generation of tools won’t be easy. Tools and Testing. I performed a few more tests on other pages as well, to confirm that this is indeed consistent behaviour.
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