[zeromq-dev] zmq_recvmsg jni

gonzalo diethelm gdiethelm at dcv.cl
Thu Oct 3 13:03:16 CEST 2013

> There is no way (that I know of) to pass a Java byte array to the underlying
> c/c++ function without a copy. What the DirectByteBuffer allows you to do is
> get the pointer to the memory region it references and you can pass this
> along to zmq_recv eliminating the need to do a copy between boundaries.

As Trevor points out, this is very correct... and it makes a huge difference in performance, even when messages are small.

Gonzalo Diethelm
DCV Chile

Declaración de confidencialidad: Este Mensaje esta destinado para
el uso de la o las personas o entidades a quien ha sido dirigido y
puede contener información reservada y confidencial que no puede
ser divulgada, difundida, ni aprovechada en forma alguna. El uso no
autorizado de la información contenida en este correo podrá ser
sancionado de conformidad con la ley chilena. 
Si usted ha recibido este correo electrónico por error, le pedimos
eliminarlo junto con los archivos adjuntos y avisar inmediatamente
al remitente, respondiendo este mensaje. 

"Before printing this e-mail think if is really necesary".
Disclosure: This Message is to be used by the individual,
individuals or entities that it is addressed to and may include
private and confidential information that may not be disclosed,
made public nor used in any way at all. Unauthorized use of the
information in this electronic mail message may be subject to the
penalties set forth by Chilean law. 
If you have received this electronic mail message in error, we ask
you to destroy the message and its attached file(s) and to
immediately notify the sender by answering this message. 

More information about the zeromq-dev mailing list