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Can you elaborate on 'authentication time made it totally impractical' ?

Does this mean it was slow? I'm using gpg-agent on osx with a neo-n to ssh into boxes and it's not noticeably slow.

Thinking on this again now, perhaps using a shorter key (I'm sure I would have chosen 4k RSA) would have helped. Regardless, I did find that connecting to 50+ hosts at the same time, most of them would hit my 3 second connect timeout with the neo-n and gpg-agent.

This is a somewhat unusual use-case, I will grant, but I also found a somewhat-noticeable delay in connecting to a single server, on the order of several hundred milliseconds.

I wonder if it would all be fine with a 2k key.

I might be mistaken, but I think Yubikeys only support 2k keys? I'm reasonably sure mine does anyway.

I got this just this second on my debian8 system.

:~$ time ssh an6n@mybox exit

real 0m1.910s

user 0m0.024s

sys 0m0.000s

Could you also list timings with just regular ssh-agent?

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