I'd like to improve the ibrd speed.

Hello!!!!

I'm South Korean 

Pleaseunderstand that I am not good at English.

I amcurrentlyimplementing a GPIBcommunicationprogram with controller and noncontroller.

The problem is, when the controller is ibrd
<SourceCode1>
IntGPIB::recv_data (string&v)
{
    vector_charbufv(BUFSIZ, 0);
    ibrd(device_, &bufv[0], bufv.size());
    v=&bufv[0];
    returnibsta&ERR ? -1:0;
}
If I use a largesize like above, the speed of ibrd is tooslow.

However, It willimprove ibrd speed if I create it as below.
<SourceCode2>
IntGPIB::recv_data (string& v, uint32_tdata_size)
{
    vector_charbufv(BUFSIZ, 0);
    ibrd (device_, &bufv[0], datasize);
    v=&bufv[0];
    returnibsta&ERR ? -1:0;
}

Is there anyway to improvespeedusing the samemethod as SourceCode1?

The size of the bufv to be read is variable.

Help me