Hello Sijmen, 

this is not something I remember seeing often on the list; to improve
your chances of replies beyond "use iperf to test" (there's tcpbench(1)
in base) you should at least provide a dmesg(8). 

Maybe even use sendbug(1) and have the report go to bugs@ [1]. 

Could you run -current [2] to see if the problem is still there?

[1] http://www.openbsd.org/report.html
[2] http://www.openbsd.org/faq/current.html

Marcus

i...@sjmulder.nl (Sijmen J. Mulder), 2018.07.14 (Sat) 01:20 (CEST):
> Hi all,
> 
> After migrating a VPS from FreeBSD to OpenBSD I noticed reduced
> networking performance. Both incoming and outgoing traffic seems to be
> 2-3 times slower on average. By testing 100MB file transfers I've
> mostly eliminated the following factors:
> 
>  - Protocol and ciphers (tested SCP, SFTP, FTP+TLS, HTTP, HTTPS)
>  - Client software
>  - Peer host
>  - VM provider/platform
> 
> The easiest way to show and test this difference is as such:
> 
>  1. Install either FreeBSD 11.2 or OpenBSD 6.3 on a machine or VM
>  2. Install curl, then `time curl -O 
> http://download.thinkbroadband.com/100MB.zip`
> 
> On both my VPS provider and my own PC with VirtualBox VMs the
> difference is about 3x for the above test. Similar results happen when
> scp-ing a file to the machine.
> 
> Any ideas on the cause of this? Any additional tests or tweaks I could
> try?
> 
> Sijmen
> 

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