I bought another extension before I read your comment. But maybe the module I have been using does not make my site perform faster. Therefore, I think I will try your module to see differences because your extension seems to be so awesome without any manual code changes. Let's wait for me and I will comback to give you my feedback.
As other said, you need to compress your image before uploading & use CDN as well. Apart from that use the extension which help to improve your search functionality.
To improve the store search functionality & faster search install elastic search extension.