export interface TraceEvent {
    pid: number;
    tid: number;
    ts: number;
    ph: string;
    cat: string;
    name: string;
    args?: Record<string, unknown>;
    dur?: number;
    tdur?: number;
    s?: string;
}
export interface TraceMetadata {
    browser_version: string;
    user_agent: string;
    viewport: {
        width: number;
        height: number;
    };
    device_pixel_ratio: number;
    timestamp: string;
    scenario: string;
    fps_target: number;
}
export interface TraceData {
    traceEvents: TraceEvent[];
    metadata: TraceMetadata;
}
export interface FrameMetrics {
    total: number;
    dropped: number;
    avg_fps: number;
    frame_budget_ms: number;
}
export interface PhaseBreakdown {
    style_recalc_ms: number;
    layout_ms: number;
    paint_ms: number;
    composite_ms: number;
    gpu_ms: number;
}
export interface LayoutThrashingHotspot {
    selector: string;
    reflow_cost_ms: number;
    occurrences: number;
    affected_nodes: number;
}
export interface GPUStallHotspot {
    element: string;
    stall_ms: number;
    occurrences: number;
}
export interface LongTaskHotspot {
    function: string;
    file: string;
    line: number;
    cpu_ms: number;
    occurrences: number;
}
export interface Hotspots {
    layout_thrashing: LayoutThrashingHotspot[];
    gpu_stalls: GPUStallHotspot[];
    long_tasks: LongTaskHotspot[];
}
export interface SuggestionSummary {
    type: 'css' | 'js' | 'native';
    target: string;
    patch: string;
    estimated_speedup_pct: number;
}
export interface TraceSummary {
    id: string;
    name: string;
    url: string;
    duration_ms: number;
    frames: FrameMetrics;
    phase_breakdown: PhaseBreakdown;
    hotspots: Hotspots;
    suggestions: SuggestionSummary[];
    metadata: TraceMetadata;
}