faster Math.exp() via JNI?

Question

I need to calculate Math.exp() from java very frequently, is it possible to get a native version to run faster than java\'s Math.exp()

Answer 1

There are faster algorithms for exp depending on what your'e trying to accomplish. Is the problem space restricted to a certain range, do you only need a certain resolution, precision, or accuracy, etc.

If you define your problem very well, you may find that you can use a table with interpolation, for instance, which will blow nearly any other algorithm out of the water.

What constraints can you apply to exp to gain that performance trade-off?

-Adam