Joined: 18 Mar 2014 Posts: 12917 Location: Netherlands
Posted: Wed Jul 19, 2017 16:27 Post subject:
First VPN, is very processor intensive, the dual core Arm CPU at 1000 HZ will not be able to do much more than 50-60 Mb/s. For fast VPN you need a router with a lot of processor power like a R 7800 which should give you about 300Mb/s.
For non VPN use the score is better, the figures I have seen on the forum are around 350 Mb/s so what you see seems normal to me
With stock firmware you can get much better probably above 600 Mb/s.
This is possible because stock firmware has something called cut trhough forwarding (CTF), this bypasses the firewall/NAT, there are drawbacks: QOS is not possible and there are concerns about safety.
This CTF is propriety and thus not included in DDWRT yet. However testing is currently done with a similar kind of software called SFE (shortcut forwarding engine) that is supposed to give similar speeds as stock.
On my R6400 speeds went up from approx 300 Mb/s to 550 Mb/s with SFE enabled (R6400 is a slower R7000).
Joined: 18 Mar 2014 Posts: 12917 Location: Netherlands
Posted: Wed Jul 19, 2017 18:24 Post subject:
I do not know figures about that particular router but the WRT1900ACS can do 100+ Mbp with 128-AES-CBC. WRT 1900/1200 are MIPs based and somewhat better than Broadcom but inferior to Qualcom/Atheros speed wise.
The fastest routers for VPN are those with the Atheros Qualcom chips like the R7800 or an R9000 with an Annapurna Labs chip.
The R9000 has a quadcore Annapurna Labs AL514 processor (quad core Arm cortex A15) with hardware encryption accelerator, at 1.7 Ghz
R7800 has a quad core Qualcomm IPQ8065 with two 800 MHZ cores and two Krait 300 cores at 1.7 GHz basically a big.little chip. Krait cores are cortex A9 derived but performance wise almost A15 class.
This chip also has a hardware Crypto accelerator (AES/3DES/SHA).
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