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96d4d82716
host_ip resolved socket.gethostbyname on every access with no cache. get_ip_on_same_subnet touches host_ip 2-4 times per link, so opening a 2500-link project issued thousands of blocking DNS calls inline on the event loop — freezing all concurrent link coroutines each time. This is the most likely cause of the 12-link/s throughput (1000x below what Pool(concurrency=100) should deliver) and the burst+pause pattern. - compute.host_ip: cache the resolution in _host_ip_cache, invalidate on host setter change - UDPLink.create: timing log splitting get_ip / ports / nio so the next project-open confirms where time actually goes