Zynga: The pioneer Trail too slow

I don’t know that this is only me or there are some other users also who are going through this issue. I found that the game is too slow for me and many of the times that is impossible to play. I am a high level player like level 41. I am not able to guess that what could be the issue with this and how this can that be resolved. I will be thankful to all the replies for this.