During some internal benchmarking we noticed some interesting behavior with memory usage. @tasansal thinks it could be related to [vindex](https://github.com/TGSAI/mdio-python/blob/927cd3fcd1a1b544278a8d983fe2050878d6bd11/src/mdio/core/grid.py#L80C1-L96C52). <img width="1619" alt="Image" src="https://github.com/user-attachments/assets/78703fd1-4448-44b8-ba21-50c02ffd4004" />
