Experience with ultra low latency low-latency switch / network ?

Hello all,

trying to learn regarding low-latency switches - we have need for specific setup, but seems not many people have know-how - or day to day experience on this type of hardware.

We mostly use Arista hardware (in range of 350ns - 380ns latency) but seems there is specific switches that can do way less, in ranges of 4-5ns (This is not a typo)

Arista have 7130 series with this specification, but seems this is hardware they got by buying metamako.com company few months back (Links bellow).

I would welcome any feedback (bugs, issues, problems) on this type of hardware as well any alternative that you guys maybe know from other Vendors (Cisco, Juniper etc).

• https://www.arista.com/en/products/7130-layer-1-network-switches-quick-look

• https://www.metamako.com/products/metamux-48e.html