The original title is "Linxr | Part 8 — Fixing Network Latency & SLIRP Terminal Slowness"

Short summary

Linxr Part 8 details how network latency in QEMU SLIRP user-mode networking on Android was reduced from 250ms to under 15ms. The root cause was Nagle's algorithm coalescing single-byte SSH keystroke packets. Fixing it required TCP_NODELAY on local port forwards and tuning virtio-net MTU with checksum offloading disabled.

• •SSH keystrokes buffered 100-300ms due to Nagle's algorithm in SLIRP
• •TCP_NODELAY on port forwards plus virtio-net MTU tuning fixed latency
• •Keystroke response dropped from 250ms to under 15ms

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