Performance issues when showing banner ad

I noticed performance slow down when an ad is shown. Banner admob ad inside a game level.

Is this “normal”? It also influences some timers and active transitions. I have some enemy waves on screen and when a banner ad is shown small lags can stop the movement for small moments which then will result in the enemy waves to be not in order anymore, which means some of the enemies are moved already on and some are a little bit behind. So showing ads is messing with the timers and transitions which are active.

I hope this maybe is only happening on older devices because currently I test it on an old one, but is this a known problem with ads?

When you show a banner ad, the device has to make a network connection to the ad provider (which could have more network connections from their servers to the actual ad creative), download the image to your device and display it. Depending on network performance, the size of the banner ad, if it has animation, video or some other “smart” features, it can have impact. Most ad providers do not recommend loading and showing of ads at times when you’re app’s performance need to be at it’s best.  Device CPU and available memory factor in as well. 

Rob

When you show a banner ad, the device has to make a network connection to the ad provider (which could have more network connections from their servers to the actual ad creative), download the image to your device and display it. Depending on network performance, the size of the banner ad, if it has animation, video or some other “smart” features, it can have impact. Most ad providers do not recommend loading and showing of ads at times when you’re app’s performance need to be at it’s best.  Device CPU and available memory factor in as well. 

Rob