LabelLayer is unable to load large amounts of data

[liangyuan1]

code

// 如果不是url，使用data接口数据
const twonSource = new itowns.FileSource({
url: '/data/point2.geojson',
crs: 'EPSG:4326',
format: 'application/json'
});

    const properties = {
      fill: '#eba55f',
      stroke: '#eba55f'
    };
    // 定义一个样式函数，该函数根据属性返回样式对象
    function getStyleFromProperties(properties) {
      cons.log('-------dsd----------', properties);
      // 基于属性动态创建样式
      const style = {
        fill: '#eba55f',
        stroke: '#eba55f'
      };

      return style;
    }

    const style = itowns.Style.setFromProperties(properties, {
      type: itowns.FEATURE_TYPES.POINT
    });

    const twonLayer = new itowns.LabelLayer('twon', {
      name: 'twonLayer',
      transparent: true,
      source: twonSource,
      // style: e => {
      //   console.log('-0-0-0-0-0-0-0:', e);
      // }
      // style: style

      style: {
        point: {
          color: 'red',
          //  e => {
          //   console.log(e);
          //   return ;
          // },
          line: 'red'
        },
        icon: {
          source: 'http://localhost:8080/data/1.png'
          // size: 100
        },
        fill: {
          color: 'orange',
          opacity: 0.5
        },
        stroke: {
          color: 'red'
          // e => {
          //   console.log(e);
          //   return ;
          // }
        }
      }
    });

    view.addLayer(twonLayer);

###result
ColorLayer cannot display icons when loading point data. LabelLayer can display icons when loading point data, but there is a noticeable lag when loading 1000 points on the page. Is there a good method to load icons efficiently and load at least 1000 points at the same time? Below is a rendering of the obvious lag when loading

[Desplandis]

Can you provide a dataset to reproduce this issue?

[liangyuan1]

Can you provide a dataset to reproduce this issue?
@Desplandis
point.zip