[Bug Report] vue-cesium-v2同时启用arcgis地形+<vc-navigation>导航控件非常卡顿

VueCesium version

2.2.5

OS/Browsers version

Windows10/Chrome最新版

Vue version

3.1.4

Reproduction Link

详见 测试代码 ：

Steps to reproduce

vue版本：2.6.12
vue-cesium-v2最新版本：2.2.5

测试发现同时启用arcgis-tiled-elevation地形 vc-navigation导航控件时会导致cesium非常卡顿。 测试代码 如下：

<template>
  <div class="viewer">
    <vc-viewer @ready="ready">
      <vc-layer-imagery>
        <vc-provider-imagery-bingmaps
          url="https://dev.virtualearth.net"
          bmKey="AgcbDCAOb9zMfquaT4Z-MdHX4AsHUNvs7xgdHefEA5myMHxZk87NTNgdLbG90IE-"
          mapStyle="Aerial"
        ></vc-provider-imagery-bingmaps>
      </vc-layer-imagery>
      <vc-provider-terrain-arcgis-tiled-elevation
        :url="'https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer'"
      ></vc-provider-terrain-arcgis-tiled-elevation>
      <vc-navigation></vc-navigation>
    </vc-viewer>
  </div>
</template>

<script>
export default {
  data() {
    return {
      terrainUrl:
        "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer",
    }
  },
  methods: {
    ready(cesiumInstance) {
      const { Cesium, viewer } = cesiumInstance
      var target = new Cesium.Cartesian3(
        300770.50872389384,
        5634912.131394585,
        2978152.2865545116
      )
      var offset = new Cesium.Cartesian3(
        6344.974098678562,
        -793.3419798081741,
        2499.9508860763162
      )
      viewer.camera.lookAt(target, offset);
      viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY)

      //调试信息：FPS帧数
      viewer.scene.debugShowFramesPerSecond = true
    },
  },
}
</script>

What is Expected?

平均帧率50fps左右，界面流畅顺滑

What is actually happening?

测试发现同时启用arcgis-tiled-elevation地形 vc-navigation导航控件时会导致cesium非常卡顿，帧率下降到10fps以下

zouyaoji / vue-cesium

[Bug Report] vue-cesium-v2同时启用arcgis地形+<vc-navigation>导航控件非常卡顿 #117