Fun fact: lots of exchanges claim their matching engine can process huge numbers of orders per second. They're basically all lying.
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I was always under the impression that this was more of a CPU multi-threading limitation more than anything else.
CPU and multithreading can be achieved with metal instances. But cost is 3 times having the same setup in your rack. Also problem is more: 1. Ability to connect servers back to back. 2. pick your own selected hardware switches and firewalls. 3. distance between hosts 4. disks
