Which is the fastest way to access native code from Java?

Question

Which is the fastest way of calling a native library from Java?

The ones I know about are

• NativeCall - what we're currently using
• JNA - haven't used it, but looks reasonable
• JNI - looks horrendous to write, but we'll do it if we get the speed

Answer 1

Swig makes JNI easier too.

In terms of speed, I suspect there will be subtle variations - I strongly suggest you pick a call that you know you'll be making a lot, and benchmark all of the solutions offered.