slow complex<double>'s with g++

[Greg Buchholz]

Brian Budge wrote:
> Which command line arguments are you using?  

    Mostly "-O3", but I've tried lots of combinations of different
options and I haven't yet found the magic incantation.

>Can you make use of sse2?

    Well, there is a C version that I wrote which uses gcc's vector
extensions and SSE2...

http://shootout.alioth.debian.org/gp4/benchmark.php?test=mandelbrot&lang=gcc&id=3

...but right now I'm more interested in why normal complex<double>'s are
so slow.

Greg Buchholz