在vue框架，加载大量数据的geojson，导致页面出现断点并崩溃，

var two = Cesium.GeoJsonDataSource.load('../../../static/country_one.json');
 two.then(function(dataSource) {
 console.log(dataSource)
 viewer.dataSources.add(dataSource);
 var entities = dataSource.entities.values;
 console.log(entities)
 let color = new Cesium.Color(6/255.0,37/255.0,75/255.0,255/255.0);
 let outlineColor = new Cesium.Color(12/255.0,71/255.0,143/255.0,255/255.0);
 for (let i = 0; i < entities.length; i++) {
 var entity = entities[i];
 entity.polygon.material = color;
 entity.polygon.outline = true;
 entity.polygon.outlineColor = outlineColor;
 entity.polygon.outlineWidth = 2;
 entity.polygon.height = 0;
 entity.polygon.extrudedHeight = 0;
 }
 });
 

怎么解决，目前找了很多方式，都没解决。