FS-Skia-UI
Perf Module
Feature 108 (US3, FR-009/010): the pure, headless, deterministic frame driver. Folds an ordered `FrameInput` script over the host's pure `Update` + `RetainedRender.step`, advancing one frame per step (consecutive pointer-MOVE inputs coalesce into a single frame) and accumulating the per-frame `FrameMetrics`. Shares the message→update→retained-step + clock-advance + coalescing code path with `runInteractiveApp` (no parallel logic), so a regression that un-coalesces moves or reintroduces a per-hover full rebuild fails the byte-stable count golden (SC-003/004/005) rather than shipping. The four count/bool fields are identical across repeated runs of the same script; `FrameDuration` is not asserted.
Functions and values
| Function or value |
Description
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Full Usage:
runScript host size script
Parameters:
InteractiveAppHost<'model, 'msg>
size : Size
script : FrameInput<'msg> list
Returns: FrameMetrics list
Type parameters: 'model, 'msg |
Fold an ordered `FrameInput` script over the host's pure `Update` + `RetainedRender.step`, returning the per-frame `FrameMetrics` (consecutive pointer-MOVE inputs coalesce into one frame). Pure, headless, byte-stable in its count/bool fields (SC-003/004/005).
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