Deep-Inspection Slows down upload

[Infotech22_05]

Hi people,

I did some testing because our upload/download speed is nowhere where it should be.
We have 1000/1000Mbps contract with our ISP.

When I test the speed without Deep Inspection we got 925/925, that is pretty great.
When I enable Deep inspection our speed goes to 850/350 which is really bad.

Testing is done in this way:

Client PC > Access Switch > Core Switch > FortiGate > ISP > Internet

Anybody has some ideas ?

[spoojary]

PLease follow this doc: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Low-throughput-troubleshooting/ta-p/272657

also try the speed test with only FGT-PC and remove switches.