Impact of using extended completion with SDK models

Hello,

I have a question regarding the impact of using extended interpolation in models intended for the SDK.

According to the manual, the following applies:

When extended interpolation is set on an object with multiple parameters set, the keyframes added by the extended interpolation are multiplied, causing the model file size to increase proportionally.
When handling extended interpolation in the SDK, it does not significantly affect runtime performance, but please note that the speed at which the model loads will decrease.

Regarding the statement “the speed at which the model loads will decrease,” I understand that if we compare the following two scenarios, scenario B would result in slower model loading speeds:

A,
3 keyframes are placed
● ● ●

● ● ●

B,
Extended interpolation (2 additional points) is set on 3 keyframes
● ・ ・ ● ・ ・ ●

● ・ ・ ● ・ ・ ●

Next, in the case of the following patterns, which one would have slower display speeds?
(Since both involve 7x7=49 points, does this mean the loading speed is roughly the same?)

C,
7 keyframes are placed (with 2 additional keyframes evenly spaced between each of the 3 original keyframes)
● ● ● ● ● ● ●

● ● ● ● ● ● ●

D,
Extended interpolation (2 additional points) is set on 3 keyframes
● ・ ・ ● ・ ・ ●

● ・ ・ ● ・ ・ ●

If C and D have roughly the same loading speed (or within the margin of error), does this mean that scenario D might offer better cost-performance when considering potential model revisions?

I apologize for the unclear example, but I appreciate your assistance.

@damen

Thank you very much for your continued patronage of our products.
This is Lvie2D Staff.

There is no significant difference in loading speed between C and D.

Extended interpolation is dynamically generated from keyframes within the Cubism Editor, regenerating the intermediate shapes every time a keyframe is edited.
However, once exported for the SDK, no further editing occurs, so the generated shapes are exported in a state equivalent to keyframes.
Therefore, if extended interpolation can achieve the same result, using it can reduce the workload.

Best regards.