Thanks Michael actually we are thinking of writing our own binary format will it be a good idea ?

Hi Guys, I have a small problem i hope you guys can help. Actually i have an Win32 application which contacts to a cloud server and the communication between my client and server code is both the XML and json formats. But can u suggest me some other formats where size of my code should be less and communication should be fast and reliable. Any suggestions please. Thanks in advance.