Best approach to render large number of rectangles with different sizes

[zip87]

I am trying to render a graph. There could potentially be tens of thousands of rectangles with different sizes. Each rectangle can be dragged, resized, and has a border and inner text. Additionally, the graph offers the possibility to zoom and pan.

At the moment I use this texture:

export const whitePixelTexture = Texture.fromBuffer(
  new Uint8Array([255, 255, 255, 255]),
  1,
  1
);

To improve performance, I have opted to use Culling and BitmapText.

What can I do differently?