Drupal feeds module causing high cpu usage when pulling feeds
If you are in shared hosting, then it is the right time to upgrade to VPS or Dedicated Server. 

I had a same issue How to control resource usage of my website? , better you can remove the unwanted bots. You need to see the Access Log in your hosting control panel.

try disabling your modules one at a time to decide when the load time gets really high and remove the unwanted modules and also it delete from modules folder.