How to check that how much data transfer between client & server during partial postback?

is there any tool by which i can check how much data transfer between client & server during partial post back. i hard firebug could help this regarding this matter. i never 开发者_StackOverflow社区use firebug so please someone tell me how to check that how much data transfer between client & server during partial post back with the help of firebug or any other tool during partial post back. please guide me in detail. thanks in advance.

Look at Network Monitoring in FireBug.