should I cache textures in properties in sprite kit?

问题

I am using atlases for the image assets in my game. I am preloading all my atlases at the beginning of my Game Scene with SKTextureAtlas preloadTextureAtlases which made a big difference when I started using it. Here is my question:

Should I create a property for each texture that is going to be applied again and again to spawned monster or pickup sprites? Or is it completely unnecessary overhead because I am preloading my atlases in my Game Scene?

The below are 2 very simple examples in a Monster class.

Cache Texture:

- (id)initWithSize:(CGSize)size
{
    if (self = [super init]) {
        SKTextureAtlas * atlas = [SKTextureAtlas atlasNamed:monsterAtlas];
        self.monsterFighterTexture = [atlas textureNamed:@"monster-fighter"];
    }
    return self;
}

- (Monster *)monster
{
    Monster * monster = [Monster spriteNodeWithTexture:self.monsterFighterTexture];
    return monster;
}

Don't cache texture.

- (Monster *)monster
{
    SKTextureAtlas * atlas = [SKTextureAtlas atlasNamed:monsterAtlas];
    Monster * monster = [Monster spriteNodeWithTexture:[atlas textureNamed:@"monster-fighter"]];
    return monster;
}

来源：https://stackoverflow.com/questions/28007839/should-i-cache-textures-in-properties-in-sprite-kit