Modern HTTP
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Published: Oct 8, 2025
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing.
How to pass this insight
Configure your server to use HTTP/2 or HTTP/3.
Some resources are excluded from consideration in this insight. This insight will only consider resources that are:
- Served over HTTP/1.1 or earlier.
- Served over an origin that serves at least 6 static asset requests (if there aren't more requests than browser's max/host, multiplexing isn't as big a deal).
- Not served on localhost (modern versions of HTTP are often not supported locally and in CI, so this insight ignores local web servers).
See the insight source code for more details.
Additional references
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-10-08 UTC.
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