Luxar Viewer API Documentation - v2026.9.22
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    Class PerformanceMonitor

    Compact, theme-matched performance readout (the vendored replacement for stats.js). Shows one metric at a time and cycles FPS → frame time (ms) → a scrolling graph on click, driven by the animation loop's frame-start / frame-end events (subscribed to only while visible). Preserves the original #luxar-stats element id and toggle/show/hide/dispose surface so the P-key InputHandler and control-rail gauge drive it unchanged.

    Index
    constructor
    el numEl unitEl canvas ctx2d isVisible mode frameStartUnsubscribe frameEndUnsubscribe frameT0 msEma frameCount windowStart fps lastRender fpsHistory keepAlive?
    element visible
    onFrameStart onFrameEnd render drawGraph toggle show hide cycleMode dispose subscribeToFrameTiming unsubscribeFromFrameTiming
    el: HTMLDivElement
    numEl: HTMLSpanElement
    unitEl: HTMLSpanElement
    canvas: HTMLCanvasElement
    ctx2d: CanvasRenderingContext2D | null
    isVisible: boolean = false
    mode: PerfMode = 'fps'
    frameStartUnsubscribe: Unsubscribe | null = null
    frameEndUnsubscribe: Unsubscribe | null = null
    frameT0: number = 0
    msEma: number = 0
    frameCount: number = 0
    windowStart: number = 0
    fps: number = 0
    lastRender: number = 0
    fpsHistory: number[] = []
    keepAlive?: PerfKeepAlive
    • get element(): HTMLElement

      The widget element — the caller mounts it (e.g. docked in the control rail).

      Returns HTMLElement

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