[Blitz-support] slow TinyVector subtraction

[Daniel F. <dw...@as...>]

I tried timing the subtraction of two TinyVector<double,3> variables 
with a profiler,
c = a - b;
(repeating this lots of times for the profiler)

but I find that this takes twice as long as an equivalent lower-level 
set of expressions:
c(0) = a(0) - b(0);
c(1) = a(1) - b(1);
c(2) = a(2) - b(2);

I am using blitz-0.9, gcc 3.2.2, Linux, on an Intel Pentium 4.
I have tried compiler options -O3 -falign-double -ffast-math 
-fstrict-aliasing -funroll-loops -fomit-frame-pointer.

Is the slower performance for the high-level syntax expected, or does 
this indicate that I need to change something?  I wonder if it could be 
the compiler (gcc vs. Intel), the compiler flags, or a faulty 
installation of blitz?

Thanks,
Dan