SkinnedMeshRenderer.bakeMesh mobile phone performance is very low

Changing the bleedshape will update the skin vertices. I only need to care about the change of one point. The performance of bakeMesh is too low. Is there a way to calculate it manually?
Try to pass the code provided by get skinned vertices in real time , but unfortunately it has no effect

Might just be easiest to throw an extra bone into your animation hierarchy and animate it in sync with the main animations, then read the position from there, such as for a hand attach point.

Thank you very much for your answer. The model is an avatar. The vertices are updated through the blendshape of SkinnedMeshRenderer. The bones should not work at present.