Hello Assi,
Can you elaborate on "slow performance"? Slow is significantly different than packet loss and if you're seeing loss, all performance bets are off. What does traceroute show you in terms of latency, etc? Tools like mtr can be very helpful too:
https://www.digitalocean.com/community/tutorials/how-to-use-traceroute-and-m...
--David KI6ZHD