I tried many speed optimization plugin like RabbitLoader, Nitropack, Swift Performance, and ended uninstalling them because they were causing unexpected issues on the sites (mostly blank images) or reducing the performance score (sites are hosted on a powerful server with Cloudflare CDN Enterprise).
I tried this plugin after seeing a message from the community and it boosted all my sites instantly, and for the moment I haven't noticed any issues.
I'm really surprised and amazed.
Keep the good work!