When Safari can't resolve IPv6 DNS lookups, the URL bar is extremely slow
Originator: | thomas | ||
Number: | rdar://31961971 | Date Originated: | 5/3/17 |
Status: | open | Resolved: | |
Product: | macOS + SDK | Product Version: | 10.12.4 (16E195) |
Classification: | Serious Bug | Reproducible: | Always |
Area: Safari Summary: After typing a URL in the URL bar and hitting Enter Safari just sits there and doesn't nothing for 10-20 seconds. After that the page loads normally. Steps to Reproduce: 1. Have IPv6 auto configured, but the network not support it 2. Type a URL that hasn't been locally cached in the Safari URL bar 3. Press the Enter key Expected Results: Page loads more or less immediately Actual Results: There's a 10-20 second delay before the page loads. Version: 10.12.4 (16E195) Notes: Turning off IPv6 seems to solve the problem: $ networksetup -setv6off "Wi-Fi" I've tried clearing Safari caches completely, and the obvious reboots, but that didn't change anything. I'm on a Unifi Wi-Fi network, with a Comcast Business internet connection. Other browsers, like Chrome and Firefox do not exhibit this problem. Configuration: MacBook Pro (13-inch, 2016, 4 Thunderbolt 3 Ports)
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