Consider JNA instead of JNI?

[jacek99]

Having to compile the JNI layer is a major deployment obstacle, especially for external customer sites (where often we do not even have proper permissions, etc).

Would you consider doing a JNA-based binding instead, maybe using their static binding to get JNI-level performance?

https://github.com/twall/jna

[gonzus]

Hi Jacek,

Yes, I would consider adding a JNA implementation / version of jnano, given how much simpler it is than JNI.

However, be advised of this: when I implemented the Crossroads Java binding, I did some performance tests comparing JNI and JNA, and the difference was very noticeable. Given that one of the goals of nanomsg is high performance (low latency, high throughput), it did not seem advisable to go the JNA route.

You should open up a discussion on the nanomsg mailing lists, to see what everyone else thinks about this.

Best regards,

Gonzalo Diethelm DCV Chile

From: Jacek Furmankiewicz [mailto:notifications@github.com] Sent: Thursday, September 19, 2013 8:05 PM To: gonzus/jnano Subject: [jnano] Consider JNA instead of JNI? (#2)

Having to compile the JNI layer is a major deployment obstacle, especially for external customer sites (where often we do not even have proper permissions, etc).

Would you consider doing a JNA-based binding instead, maybe using their static binding to get JNI-level performance?

https://github.com/twall/jna

— Reply to this email directly or view it on GitHubhttps://github.com/gonzus/jnano/issues/2.

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[jacek99]

That would be a problem. In your JNA perf tests, were you using direct mapping?

https://github.com/twall/jna/blob/master/www/DirectMapping.md

I believe this is what they recommend in order to get perf approaching custom JNI.

Thank you for your efforts in bringing this interesting project to the Java ecosystem.

[gonzus]

I apologize for answering this after seven months! My fault, I am sorry.

I don't think I used direct mapping in my tests. It would be interesting if you could experiment a little and compare the current JNI-based binding with one or more JNA-based bindings.