哈哈这个问题我研究过，很大可能是与隐私保护的相关功能：
> Complaints about website loading have been trickling in of late, and while the details vary, the commonality has been that the problems started with macOS 12.4 Monterey. Sometimes the problem was just with Safari; other times, it affected Chrome and other browsers too. In some cases, the entire page would refuse to load; in others, only portions of the page would fail.
> The solution to the problems I’ve seen so far is simple: in System Preferences > Network, turn off Limit IP Address Tracking for each network adapter you use (Ethernet and Wi-Fi below—they look surprisingly different).
具体涉及三个开关选项，都有可能使得网页浏览变慢：
> 1. iCloud Private Relay: This overarching privacy feature routes all your traffic through two separate Internet relays to hide your IP address from the site to which you’re connecting. You can turn it on and off in System Preferences > Apple ID on the Mac and Settings > YourName in iOS and iPadOS.
> 2. Limit IP Address Tracking: This option is either enabled or disabled for each network you use, whether Wi-Fi, Ethernet, or cellular. As noted above, its description changes depending on whether iCloud Privacy Relay is on or off.
> 3. Hide IP Address: Safari and Mail both offer this option in their preferences but say little about how it relates to iCloud Private Relay.
具体是哪一个，很玄学。引用自： [Solving Connectivity Problems Caused by Interlocking Apple Privacy Settings](
https://tidbits.com/2022/06/20/solving-connectivity-problems-caused-by-interlocking-apple-privacy-settings/)
PS：你的情况只发生在 Safari 上的话，可以试试暂时关闭 Safari Setting > Privacy > Hide IP Adress