- MPVRenderView keeps its display link paused while the stream has no
video, instead of rendering and presenting 60 empty frames a second
- Chapter segments get clamped played/buffered fractions and are
equatable, so a time update re-renders only the chapter under the
playhead instead of every segment
- The mini player pauses its scrolling titles while the expanded player
covers it (iOS/tvOS)
- Performance logging no longer flags the first sample after a
foreground/background transition as high CPU
With the expanded player open in audio-only mode on an iPhone 12 mini,
app CPU dropped from ~30% to ~12% and wakeups from ~128/s to ~37/s.
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