Bad Subversion performance while transfering Asset files

Hi Devs,

I'm using Unity just since 2 month and I'm still very new in game development. I work as a .Net (especially C#) developer for around 9 years and I like to use Visual-Studio together with TortoiseSVN and Windows 10. For that cases I have a virtual machine hosted in Azure, running VisualSVN Server on it.
In the past I had just smaller files but now I have some Assets, from the Asset-Store for example, which have a size of let's say 60 Megabyte. If I want to checkin these Assets, the file transfer is very slow with in the average of 0.2 Mbit/s. This is really a pain...
When I tansfer files over FTP vor example to that server, I have a much better Performance. Therefore, I assume that it is a svn problem but I'm not really sure.
Did anyone have the same problems and/or have any tricks or tweaks to get a better transfer performance?
Is it recommendable to switch to another Version Control System?