I have a large amount of coordinates(420k lines) to render cylinders and two points make a cylinder. The result is when I drag the camera control the model is extremely slow. I’ve tried createInstance, it does make everything faster but as it is for previewing 3d printing result, the top layers may be different, hence can not use createInstance. Is there other way to help with performance? Thanks!

```
const createScene = function () {
const scene = new BABYLON.Scene(engine);
const camera = new BABYLON.ArcRotateCamera("camera", Math.PI / 2, Math.PI / 4, 5, BABYLON.Vector3.Zero(), scene);
camera.attachControl(canvas, true);
// Add lights
new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(1, 1, 0), scene);
new BABYLON.DirectionalLight("light2", new BABYLON.Vector3(0, -1, 1), scene);
// Use a single material instance for all tubes
const cementMaterial = new BABYLON.StandardMaterial("cementMaterial", scene);
cementMaterial.diffuseColor = new BABYLON.Color3(0.7, 0.7, 0.7); // Light gray color
cementMaterial.roughness = 1; // Rough surface
const tubes = []
let v1, v2
coordinates.map(coordinate => {
if(v1) {
v2 = v1
v1 = new BABYLON.Vector3(coordinate.x, coordinate.y, coordinate.z)
const tube = createTubeFromTwoPoints(scene, v1, v2, cementMaterial)
tubes.push(tube)
} else {
v1 = new BABYLON.Vector3(coordinate.x, coordinate.y, coordinate.z)
camera.setTarget(v1)
}
})
const mergedMesh = BABYLON.Mesh.MergeMeshes(tubes)
return scene;
};
const createTubeFromTwoPoints = (scene, pointB, pointA, material) => {
// Calculate the cylinder's height and position
const direction = pointB.subtract(pointA);
const height = direction.length();
const midPoint = BABYLON.Vector3.Center(pointA, pointB);
// Create the cylinder
const radius = 0.42; // Adjust the radius as needed
const cylinder = BABYLON.MeshBuilder.CreateCylinder("tube", { height: height, diameter: radius * 2, tessellation: 20 }, scene);
// Position and rotate the cylinder
cylinder.position = midPoint;
// Calculate the rotation needed
const axis = BABYLON.Vector3.Cross(BABYLON.Vector3.Up(), direction).normalize();
const angle = Math.acos(BABYLON.Vector3.Dot(BABYLON.Vector3.Up(), direction.normalize()));
cylinder.rotationQuaternion = BABYLON.Quaternion.RotationAxis(axis, angle);
// Create a cement-like material
cylinder.material = material
return cylinder
}
```