I fixed my problems with caching Bridj JNI objects myself. I put some notes 
here: 
https://stackoverflow.com/questions/45770502/how-to-properly-cache-bridj-jni-objects-in-java-scala

On Tuesday, 22 August 2017 16:57:15 UTC+2, Daniel Korzekwa wrote:
>
> I'm looking for some guidelines on caching and reusing Bridj JNI objects 
> between multiple JNI calls. I found that caching JNI objects vastly speeds 
> up calling C functions over JNI but it also causes some numerical stability 
> issues. Basically, sometimes the same C function with the same arguments 
> produces different results.
>
>
> I found this page discussing how to cache JNI objects. 
> http://www.latkin.org/blog/2016/02/01/jni-object-lifetimes-quick-reference/
>
>
> Does anyone do it in BridJ, any hints on how to cache primitives, structs, 
> pointers, etc.?
>
>
> Link to the same question on stackoverflow: 
> https://stackoverflow.com/questions/45770502/how-to-properly-cache-bridj-jni-objects-in-java-scala
>
>

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