我在PC上運行服務器(C++ Winsock)和客戶端(Java)。Winsock C++ - Java Connection Slow Speed
我發送一個大的字節數組從我的客戶端到服務器,而傳輸完成沒有任何錯誤,我得到一個非常慢的傳輸速度。舉一個例子,對於200.000字節的數組大小,傳輸需要3-5秒(大約50kB/s)。
這是正常的嗎?我不是專家,但是我不應該通過局域網達到更高的速度(大約1Mb/s)嗎?
這裏是我的簡化代碼:
客戶端(JAVA)
import ...
public class Client {
public static void main(String[] args) throws IOException {
OutputStream outToServer;
DataOutputStream out = null;
String serverHostname = new String ("...");
int port = ...;
Socket client = null;
try {
client = new Socket(serverHostname, port);
outToServer = client.getOutputStream();
out = new DataOutputStream(outToServer);
int size = 200000;
byte[] b = new byte[size];
new Random().nextBytes(b);
for(int i = 0 ; i < size ; i++){
out.writeByte(b[i]);
}
out.close();
} catch (UnknownHostException e) ...//Exit
catch (IOException e) ...//Exit
client.close();
}
}
和服務器(C++,Winsock的)
#undef UNICODE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>...
// Need to link with Ws2_32.lib
#pragma comment (lib, "Ws2_32.lib")
// #pragma comment (lib, "Mswsock.lib")
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "..."
int __cdecl main(void)
{
WSADATA wsaData;
int iResult;
SOCKET ListenSocket = INVALID_SOCKET;
SOCKET ClientSocket = INVALID_SOCKET;
struct addrinfo *result = NULL;
struct addrinfo hints;
int iSendResult;
char recvbuf[DEFAULT_BUFLEN];
int recvbuflen = DEFAULT_BUFLEN;
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) //Return
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
// Resolve the server address and port
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0) ...//Return
// Create a SOCKET for connecting to server
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET) ...//Return
// Setup the TCP listening socket
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR) ...//Return
freeaddrinfo(result);
iResult = listen(ListenSocket, SOMAXCONN);
if (iResult == SOCKET_ERROR) ...//Return
// Accept a client socket
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET) ...//Return
// No longer need server socket
closesocket(ListenSocket);
// Receive until the peer shuts down the connection
int bytes = 0;
do {
iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (iResult > 0)
bytes += iResult;
else if (iResult == 0)
//Connection Closing
else
...//Return
} while (iResult > 0);
printf("Received %d bytes\n", bytes);
...//Shutdown and Return
}
你是冠軍,它是緩衝輸出:)新速度是64Mb/s ... 1000倍更快!非常感謝,我一直在排查幾天。你可以把它作爲答案發布,以便我可以接受它嗎? – Theo
做完了,很高興能有所幫助。 – vaxquis