message: Use `child._texture` instead of `child.texture`.
  For better performance ,  a bit little  , but worth.
diff: @@ -237,7 +237,7 @@ export default class ParticleContainer extends core.Container
  continue;
  }
  - const frame = child.texture.frame;
  + const frame = child._texture.frame;
  context.globalAlpha = this.worldAlpha * child.alpha;
  @@ -305,10 +305,10 @@ export default class ParticleContainer extends core.Container
  finalHeight = frame.height;
  }
  - const resolution = child.texture.baseTexture.resolution;
  + const resolution = child._texture.baseTexture.resolution;
  context.drawImage(
  - child.texture.baseTexture.source,
  + child._texture.baseTexture.source,
  frame.x * resolution,
  frame.y * resolution,
  frame.width * resolution,
  