forked from unom/punktfunk
enricobuehlerandClaude Fable 5
2149673f89
Field report (iPad Pro 13" M4, 2752x2064@120): display 23.1 ms on the default arrival pacing vs 14 ms glass-gated, dominating an otherwise ~14 ms pipeline. On iOS the layer ALWAYS vsync-latches (displaySyncEnabled is macOS-only API) and default-on VRR steers the panel to the stream rate, so arrival pacing's sticky-FIFO saturation (~2-3 refreshes of queue) is the common case, not the corner — the exact regime that made tvOS default to glass. - PresenterChoice.platformDefault -> stage3 on iOS/iPadOS (joins tvOS); explicit stage-2 stays the honest arrival A/B; macOS unchanged. - PresentGate generalized to a capacity: depth 1 is bit-identical to before; iOS runs depth 2 (one flip scanning out + one queued for the next latch), so a decoded frame presents immediately and latches the very next vsync instead of serializing on the previous flip's on-glass callback — expected ~5-8 ms at 120 Hz. tvOS keeps depth 1 (proven; A/B first), macOS is pinned to 1 (glass there is the DCP swapID-panic mitigation — serialization is its point). PUNKTFUNK_GATE_DEPTH (1-3) is the on-device A/B lever. - Settings picker derives its "(default)" marker from presenterDefault instead of hardcoding stage-2 as default / stage-3 as experimental. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>