Question mod_pagespeed cpu/ram usage

[Remigio]

My vps on ionos is Ubuntu 18.04.2 LTS Plesk onyx
since I manually installed the mod_pagespeed I noticed an increase in ram consumption and a fairly high activity (medium 40% - max 90%) of the CPU.
I also see from the log a lot of activity from the user mod_pagespeed that scans all parts of my website screenshot-100asa.it-8443-2019.02.20-07-05-56
Is all this normal?

 

[MarkM]

Did you gain 2x times page load speed at the cost of 3x times higher cpu loads? That's about usual based on some early testing I did. I haven't touched mod_pagespeed in a LONG time.