Function getCacheStats

Returns {
    ownedMaterials: number;
    totalRegistered: number;
    totalCreateMs: number;
    createCount: number;
}

• ownedMaterials: number

• totalRegistered: number

  Every material the manager is tracking, camera-aware or not — so a leak in a registry-only material is as visible here as one in the four geometry types. Materials in staticMaterials are counted but never receive updateCameraParams.

• totalCreateMs: number

  Cumulative wall-clock ms spent inside new XMaterial(...) calls. Excludes WebGL program compilation, which happens lazily on first render.

• createCount: number

  Number of new XMaterial(...) calls.