I want to improve the performance of Variable Mix Shapes

[yanke]

This matter has been resolved.
I have made changes to the code on the Curvy Splines side and also to be able to control it from my code.

Add the following properties to the CGDataRequestShapeRasterization.

Code:

public static bool IsChangeShape = true;

Add the following at the beginning of Equals() and GetHashCode() in the same class, respectively

Code:

if (!IsChangeShape)
    return base.Equals(obj);

Code:

if (!IsChangeShape)
    return base.GetHashCode();

The above is the code on the Curvy Splines side.
In my code, I do the following processing before Refresh() of Generator and set IsChangeShape to true only when TCB or positions is changed.

Code:

bool isAnyChangePosition = false;
for (int cpIdx = 0; cpIdx < shapeCpCount; cpIdx++)
{
    Vector3 aPos = s_splineShapeACpPositionBufferList[cpIdx];
    Vector3 bPos = s_splineShapeBCpPositionBufferList[cpIdx];

    if (!isAnyChangePosition)
        isAnyChangePosition = aPos != bPos;
}

CGDataRequestShapeRasterization.IsChangeShape =
    s_splineShapeA.Tension != s_splineShapeB.Tension
    || s_splineShapeA.Continuity != s_splineShapeB.Continuity
    || s_splineShapeA.Bias != s_splineShapeB.Bias
    || isAnyChangePosition;

I understand from your response that the different shape need to be updated even though the TCB parameters and CPs locations have not been changed.
Maybe this hack will generate a mesh with a shape that is not strictly correct.

However, in my case this was sufficient.
This technique may only work in my case, but I leave it here as reference information.

I could not have reached this point without your precise answer.
Thank you very much!