Copying in Java_java_net_SocketOutputStream_socketWrite0

[Alan Bateman]

On 01/04/2015 12:24, Robert Stupp wrote:
> Is it because of pausing GC otherwise?
>
Yes, GC and also that a Socket write is a potentially blocking 
operation. Some VMs do have a way of pinning objects in the heap (beyond 
JNI critical sections) but it is not assumed here.

If you do socket I/O with direct buffers then it doesn't need a 
temporary area of memory for the I/O.

-Alan.