Fast and effective rendering when adding huge many spheres entities

CesiumJS
1

Hi everyone.
I am a newbie with cesium.

When I draw and manage 10000 ~ 100000 spheres, I am finding more effective method.

  1. draw and add every spheres
    for(i=0; i< 10000;i++)
    {
    entity[i] = viewer.entities.add({
    name : i,
    position : any_position,
    show : show,
    ellipsoid: {
    radii : new Cesium.Cartesion3(radius, radius, radius),
    material: any_color,
    },
    label : {
    text: i,
    scale: 0.4
    }
    });
    }

  2. add and change a position after clone a entity
    var entity_base = viewer.entities.add({
    name : any_name,
    position : any_position,
    ellipsoid: {
    radii : new Cesium.Cartesion3(radius, radius, radius),
    material: any_color,
    show : false
    },
    label : {
    text: i,
    scale: 0.4,
    show: false
    }
    });

for(i=0; i< 10000;i++)
{
var entity1 = Cesium.clone(entity_base);
entity1.position = any_position;
entity1.name = i;
entity1.ellipsoid.color = any_color;
entity1.label.text = i;
entity[i] = viewer.entities.add(entity1);
entity[i].ellipsoid.show = true;
entity[i].label.show = true;
}

Which method is more effective ?