Hi brothers.

I have a comparison between Frame by Frame (FbF) and Skeleton Animation (SA). The result was made me surprise and I am nervous about that. SA's performance may be lower than FbF, I don't understand why?

Anyone can explain for me, thanks.

My test contains 2 part:
Part I
1 Sprite (17 frames) VS 1 Skeleton

GL Verts: 258 | 324
GL Call: 2 | 2
FPS: 60 | 60
Ram:  8.8 Mb | 9.3 Mb

Part II
300 Sprite (17 frames) VS 300 Skeleton

GL Verts: 2052 | 21852
GL Call: 2 | 301
FPS: 57-60 | 12-13
Ram: 15.1 Mb | 17 Mb

Note

With FbF:
Spine exported to 17 png files with FPS config: 10.
Size: 5 Kb/ frame.
Total size: approximate 100 Kb
With SA:
Spine exported an image file with 8 Kb of size.

Runtime code has been used Skeleton Data to increase performance.

spSkeletonData* HelloWorld::createSkeletonData(std::string jsonFile, std::string atlasFile) {
   spAtlas* atlas = spAtlas_createFromFile(atlasFile.c_str(), 0);
   spSkeletonJson* json = spSkeletonJson_create(atlas);
   json->scale = 1;

   auto skeletonData = spSkeletonJson_readSkeletonDataFile(json, jsonFile.c_str());
   spSkeletonJson_dispose(json);

   return skeletonData;
}

.........
_data = createSkeletonData("soul.json", "soul.atlas");
for (size_t i = 0; i < 15; i++) {
   for (size_t j = 0; j < 20; j++) {
      auto spriteSoul = SkeletonAnimation::createWithData(_data);
      spriteSoul->setPosition(
         20 + j * 50,
         20 + i * 50);
      spriteSoul->setAnimation(1, "animation-01", true);
      layer->addChild(spriteSoul);
   }
}
........

So, when should we use Skeleton Animation? Or the way to increase performance for it. Thanks.
p/s: sorry, I can not attach all of my images because forum limits that.