nothing should stop you from writing video games in Haskell since
video codec isn't video game :)))
ouch, mea culpa, I misread your message.
but I've worked with people that wrote physics engines in C/C++, and they also had to hand optimize specifically for a certain compiler to get things fast.
that's important signal. if you need to hand-optimize your code even if you use icl to compile it, using haskell will be like hunting with a hand instead of gun
well in the past I wrote a couple of video codecs (one was a multi core motion JPEG decoder), and I had to write parts of it in assembler to get fast enough frame rates. but that is already more than 10 years ago, today I don't think I could beat a C/C++ compiler like ICL anymore, at least not in a reasonable time frame