1. A method comprising: receiving, at a server, one or more hashes from a client, each of the hashes representing a graphics structure stored by the client; computing, at the server, a first hash based on a graphics structure that is generated by an application hosted by the server; and transmitting, from the server, the first hash to the client without sending the graphics structure when there is a hash from the one or more hashes received from the client that matches the first hash.