title: Cocos2d/Spritebuilder v3 laggy collision
body: <p>I'm throwing a lot of objects across the screen (1 beachball every 0.1s) and swiping them toward a box, the balls are recycled after they leave the screen or hit the ball. The problem i encountered is that when multiple balls hit the box, frame rates drop drastically. I'm not sure what's making this happen. Is there a better way to do the following so that it doesn't lag? I use the default cocos library to play sounds.</p>
  
  <pre><code>-(void)ccPhysicsCollisionPostSolve:(CCPhysicsCollisionPair *)pair can:(CCNode *)nodeA wildcard:(CCNode *)nodeB {
      if([nodeB.physicsBody.collisionType isEqualToString:@"hit"]){
          [[_physicsNode space] addPostStepBlock:^{
              [self remove:nodeA];
          } key:nodeB];
      }else if([nodeB.physicsBody.collisionType isEqualToString:@"floor"]){
          [[_physicsNode space] addPostStepBlock:^{
              [self remove:nodeA];
          } key:nodeB];
      }else {
          [self playSound:@"collide.mp3" bg:YES];
      }
  }
  </code></pre>