Slow SSLVPN Split-tunneling?

Hello!

We have a issue since a couple of weeks. We noticed that our split-tunneling SSLVPN is going around 2x to 3x slower than a full VPN connection. To give a example, a file copy from a DFS SMB share in split-tunnelling transfers at around 700ko/s while the same copy in a full VPN situation goes at around 3mo/s. What could be causing that kind of issues?

Thanks!

William