We're making Tailscale faster
Blog post from Tailscale
Tailscale outlines planned and ongoing performance improvements aimed at increasing throughput, reducing latency, lowering memory use, and improving startup reliability across its networking platform. On Linux and Android, buffer-handling changes avoid copying small packets into large fixed-size buffers and shorten packet queues, producing about a 5% speed improvement in many configurations while freeing resources for heavily used subnet routers and app connectors. A forthcoming multi-queue architecture will distribute independent traffic streams across CPU cores for subnet routers, app connectors, and exit nodes, while Linux writev support reduces memory copying and system calls to improve throughput. The company is also introducing netmap caching, which lets previously connected devices use a locally stored network map to establish peer connections before reaching Tailscale’s control plane, potentially accelerating startup substantially on unreliable networks, although it requires persistent storage and may be unsuitable for very large networks or wear-sensitive disks. These capabilities are expected to arrive progressively around and after client version 1.104, and Tailscale is additionally exploring native monitoring and testing tools that can diagnose connection paths, relay use, and modern protocols such as QUIC and HTTP/3.
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