The measured 58s uncontended load has ~0.2s of model loads -- the rest is unattributed. Stamp the renderer LoadMission span and count the CheckLoad passes that find the event queue still busy (each delays the ready transition by its 1s re-post), so the next live run names the cost. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>