Internet speed issue

[animer3009]

Hi, In my internal network I have shadowsocks server (android). I run openWRT with client and forward all traffic over the that server. Network has very low load. One pc with web traffic. I face internet speed issue. It literally makes half of my speed. I thought it was because encryption. So made changes and build it to not encrypt. Anyway traffic is local and it does not matter. No impact on speed... I tried fast open and etc... But same... I run almost default config... Please advise.

config server 'sss0' option server_port '1886' option server '192.0.0.2' option method 'none' option password 'none'

config ss_tunnel option server 'sss0' option local_address '0.0.0.0' option local_port '8053' option tunnel_address '1.1.1.1:53' option verbose '1' option user 'shadowsocks' option mode 'tcp_and_udp'

config ss_redir 'ssr0' option server 'sss0' option local_address '0.0.0.0' option local_port '1100' option loglevel 'verbose' option verbose '1' option user 'shadowsocks' option reuse_port '1' option mode 'tcp_and_udp'

config ss_rules 'ss_rules' option src_default 'checkdst' option dst_default 'forward' option redir_udp 'ssr0' option redir_tcp 'ssr0' option local_default 'forward'