Fastest TCPRecv - (Moved)

[Leo2797]

I'm trying to listen to a certain connection and wait for a packet that contains "C8420000", is there a faster way I could do this? am I using StringInStr in a correct way? does adding a huge buffer size make room for the amount of bytes it can read per single read or does it make it slower? is opening one connection for receive and one for send a good idea or can I use the same socket for receiving and sending (I'll be sending a packet after doing some work on the received data so I need a send socket) any tips would be appreciated, thanks.

 

#include <Misc.au3>

TCPStartup()

$receive = TCPConnect("127.0.0.1", 16000)
$send = TCPConnect("127.0.0.1", 16000)

While 1
   $data = TCPRecv($receive, 1000000, 1)
   if StringInStr($data, "C8420000", 2) Then
      ;do stuff with $data
   EndIf
WEnd

 

[Melba23]

Moved to the appropriate forum.

Moderation Team

[Nine]

Impossible to answer you adequately without knowing all the technical issues you are facing.

[Leo2797]

I'm not facing any, just trying to make it receive data as fast as possible so I was wondering if doing something like TCPRecv($receive, 1000000, 1)  where the buffer size is large would make it quicker or am I actually slowing it down by doing so and should narrow it down to like 1024 maybe

[RTFC]

TCP MTU over ethernet is 1500 bytes incl. headers, leaving at worst 1460 bytes of payload per segment. Since it's a stream protocol, you need a buffer a few times larger than that to guarantee you don't get buffer overflow and related errors. Theoretical maximum is 64K -1, anything larger is pointless. I use a ~16K buffer myself to avoid any data loss.