Check performance (maybe re-think InstancedRigidBody)

[JaimeTorrealba]

Description

Check and measure the measurement of the library (so we can warn the user of potential problems)

Currently, InstancedRigidBody has a significant performance drop after 100, tested in personal laptop with
Window 11, 16RAM, Nvidia Gforce 4080

Suggested solution

To end with solutions or warning about what to do and what to avoid (in the docs) or to more GitHub Issues to improve performance.
Maybe comparison with other libraries like R3F or angular three

Alternative

No response

Additional context

No response

Validations

• I agree to follow this project's Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.