Cisco ASR router performance specs

[Andrey Khomyakov <khomyakov.andrey () gmail com>]

Hi all,
Could you point me into the right direction, please, on where one would
find different performance ratings for Cisco routers other than talking to
my SE (who is on PTO right now).
My understanding is that Cisco does not publish this info. How do folks
research that kind of stuff?
For example, right now I want to find out how many DMVPN tunnels a given
model of an ASR will support and what kind of throughput I can count on
with that enabled.

Thanks in advance for answers

--Andrey