3,000 transactions per second is a normal speed of transactions with Graphene solution.
impressive
But while reading their white paper they said that "Graphene technology has also achieved 10,000-100,000 transactions per second in stress tests. The network can scale to one million messages or transactions per second out of the gate on a single machine, with theoretically infinite scaling possible in parallel between multiple machines.", this is really fast.
this is great to know that they can really manage the DiceGame. we can expect to manage the system in this kind of speed and perform well as it run into huge volume of player and transaction.