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Apple claimed [0] "If you look at the last month of connections made worldwide by Apple devices, we see that IPv6 now accounts for 26% of all connections made.

Apple claimed [0] "If you look at the last month of connections made worldwide by Apple devices, we see that IPv6 now accounts for 26% of all connections made. Twenty percent of the time, the connection could have used IPv6, but the server didn't have it enabled. And when IPv6 is in use, the median connection setup is 1.4 times faster than IPv4. This is primarily due to reduced NAT usage and improved routing." Also [1] "As of June 1, 2016, all apps submitted to the App Store must support IPv6-only networks." I guess, that is a good point for performance and revenue stream security. Of course, IPv6 has problems in some parts of the world. IPv6-only usually means, there is IPv4 on some central gateway but your clients don't get any IPv4 assigned. There is a number of really big networks doing just that e.g. most of the mobile operators in the USA. [0] https://developer.apple.com/videos/play/wwdc2020/10111/ https://developer.apple.com/videos/play/wwdc2020/10111/ [1] https://developer.apple.com/support/ipv6/ https://developer.apple.com/support/ipv6/

ipv6_or_nat 5y ago
The Apple claim is so hand wavy as to be meaningless. Without any hard data and like-to-like comparisons, the most that can be said is that IPv4 and IPv6 have different routing policies and this may attribute the differences in latency. As such what and where you test will affect your results. That being said, Apple’s IPv6 policy is probably the best thing being done to encourage adoption. However, they are not adopting the policy due to performance reasons, but due to necessity given who their ultimate customers are (cell phone companies). IPv6-only as a term has been heavily abused. A truly IPv6-only network has no access to IPv4 resources. If it does, it isn’t really IPv6-only and relies upon IPv4 addresses and NAT to work.

ipv6_or_nat 5y ago

The Apple claim is so hand wavy as to be meaningless. Without any hard data and like-to-like comparisons, the most that can be said is that IPv4 and IPv6 have different routing policies and this may attribute the differences in latency. As such what and where you test will affect your results. That being said, Apple’s IPv6 policy is probably the best thing being done to encourage adoption. However, they are not adopting the policy due to performance reasons, but due to necessity given who their ultimate customers are (cell phone companies). IPv6-only as a term has been heavily abused. A truly IPv6-only network has no access to IPv4 resources. If it does, it isn’t really IPv6-only and relies upon IPv4 addresses and NAT to work.