[Boost-users] [multi-array] Performance? Difference from GIL or uBLAS?

Has anybody measured performance of multi-array? I am considering whether or not to use it, but when I googled multi_array I got a very old, but unresolved, discussion about poor performance measurements in experiments with optimized code that uses multi_array. (http://lists.boost.org/boost-users/2003/07/4423.php) Also, after a rough glance through multi_array and uBLAS it looks like GIL, uBLAS, and multi_array seem to repeat very similar concepts (and seem to use different syntax). Isn't that kind of bad? I have been playing with GIL in the past but now I am scratching my head about these other libraries. -- John