So Slow with AF_XDP code ?

[samueljaydan]

When I get the codes and use them directly, I run the code with the following iptables rules. Then the pages open very slowly. For example, the speedtest page opens, but it starts calculating after 1 minute or so. When I close the code, there is no problem with direct internet output. What could be the reasons for this?

iptables -t nat -A POSTROUTING -s 192.168.0.0/16 -o enp2s0 -j ​​SNAT --to-source 10.10.1.254

4: enp3s0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 xdp qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 10:02:02:44:4e:9e brd ff:ff:ff:ff:ff:ff
    prog/xdp id 150 name xdp_sock_prog tag 85660fbfaf1d42c0 jited 

4: enp3s0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 xdp/id:150 qdisc mq state UP group default qlen 1000
    link/ether 10:02:02:44:4e:9e brd ff:ff:ff:ff:ff:ff
    inet 192.168.11.254/24 brd 192.168.11.255 scope global enp3s0
       valid_lft forever preferred_lft forever
    inet6 fe80::1202:2ff:fe44:4e9e/64 scope link 
       valid_lft forever preferred_lft forever