First tile starts ~300 ms after cold start: plan 51 ms (serial), shape compile 223 ms (caves,
signs, detail band, far parents). The first SurfaceWorld tiles use the native heightfield and do
not read that shape, but generateTile requires the full base shape. 8/16 m crossings repeat no
compile (61 ms for 288 tiles); a 24 m crossing died with std::bad_alloc under the 6 GiB
address-space cap (cause unknown). Telemetry not committed (+1% when off).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CSFYgsdW8ejZSyiMf4qRSX
