Traffic Shaper Limiter and CPU usage

[opn_nwo]

I have a 250/20 cable connection and I want to setup a basic shaper to limit the download bandwidth on my MEDIA VLAN (gaming console and streaming devices) to 200Mbit. This is to avoid the network to crawl whenever I download or update a large game on XSX or PS5.

I followed the documentation and it kind of works, but the CPU usage gets pegged at 100% when I start a large downloads on my Xbox. The download never gets past 130-150Mbits when the shaper is active. It seems to me that the CPU on my OPNsense (Celeron 3855U @ 1.60GHz) is the bottleneck.

For the record without the limiter I can download at full 250Mb. I know the CPU is not the latest and greatest, but I find it a bit puzzling that a simple limiter is taxing the CPU that much. It's a very simple operation that on PC is built right in all the gaming clients (Steam, Origin, BNet, etc).

Is this normal or am I missing something?