Rohit,
You won’t believe that this plugin took most of my time in development. I was about to refine it from this aspect so i can remove extra action and filter hooks but just got busy in a few other issues. But soon i will do that. It’s all about multiple hooks and useless iterations for cart items. But one more thing you can consider, it’s happening mostly on shared hosting. I am not giving an excuse that only VPS can use this plugin, but it’s something what i noticed. You will it’s improved version in future.
Thanks,
Fahad