Result for terse dumping 1m simple rules (flower with L2 key + gact
drop) on current net-next:

$ time sudo tc -s filter show terse dev ens1f0 ingress >/dev/null

real    0m3.445s
user    0m2.087s
sys     0m1.298s

With patch applied:

$ time sudo tc -s filter show terse dev ens1f0_0 ingress >/dev/null

real    0m5.035s
user    0m3.289s
sys     0m1.687s

As we can see this leads to 30% overhead in kernel space execution time.

Now with more complex rules (flower 5tuple + act tunnel key + act
mirred) on current net-next:

$ time sudo tc -s filter show terse dev ens1f0 ingress >/dev/null

real    0m4.052s
user    0m2.065s
sys     0m1.937s

Same rules with patch applied:

$ time sudo tc -s filter show terse dev ens1f0_0 ingress >/dev/null

real    0m6.346s
user    0m3.166s
sys     0m3.108s

With more complex rules performance impact on kernel space execution
time get more severe (60%). Overall, this looks like significant
degradation.