Hey guy, I hope you will satisfy with this extension. It is developed right after the launch of Magento 2 and gained good reviews!
Thank @BSS Commerce
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.
I would like to recommend you to optimize images and use CDN as well.
It can greatly speed up magento 2 store.
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.
I would recommend you have look to CloudFlare as complex CDN solution which can also optimise loading of JS & CSS, additionally to that it's complete security solution. Free official Magento 2 integration - https://marketplace.magento.com/cloudflare-cloudflare-magento.html