Traefik as reverse proxy, slow speeds

Hello,

I have traefik set up as reverse proxy to my hosted services.

The up and download speeds are not what I want them to be over https, it maxes out around 140MB/s while other up and downloads to that machine (and same disk) over other protocols like sftp max out the 2.5gb connection.

I use the latest docker image on Linux and have a pretty standard config. Is there something I can tweak ? where to start ?

Is this a common bottleneck?