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My concern is not about the TCP handshake but more on the server resources.
Lets say I need the get 10 pages from the server, each page takes 1 second to retrieve so theoretically if I use 10 threads it should take one second to get 1 page or 10 pages.
The problem starts when the server is busy with a lot of requests, it needs to allocate resources for each request and there for some of then take longer the 1 second.
If my client was to use the same resource allocated by the server (same TCP socket) for all my threads then I will not suffer from the delay because the server already allocated the resources for me.
On the other hand if each thread opens a new socket then for some threads the server will delay the replay.
This is a big problem and I cannot find a way to solve it.