Hi,
I made some benchmarking on a few OS java libraries a few months ago.
The test consists of running two geometric computation methods
involving additions, substraction and multiplications
- isCounterClockWise
- isInCircle
For 1 000 000 operations I get
double                104 ms
DoubleDouble    4334 ms
BigDecimal      29975 ms
Real                36058 ms
Dfp10              61128 ms
Apfloat            98966 ms

This is a very partial test which does not take into account what each
library can really do (floating point vs arbitrary precision,
including/not including  transcendantal functions...)

http://tsusiatsoftware.net/
http://real-java.sourceforge.net/Real.html
http://dfp.sourceforge.net/
http://www.apfloat.org/apfloat_java/

Michaƫl

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