uomopalese on "[Plugin: Autoptimize] Page load time increased after plugin installation"

Hi, please can you help me to understand?
I installed the plugin and checked HTML, JS and CSS.
On GTmetrix my score increase from 83% to 90% but in my browser i see the page load slower (time increase from 0.940 to 2.43); also in Google PageSpeed Insights the score decrease both in Mobile and Desktop.
Am i missing something?
Thanks.

https://wordpress.org/plugins/autoptimize/