Well I did trading systems in both of these, and I think it's much more natural to do it in C++. The thing about banks doing systems in Java doesn't really con

Well I did trading systems in both of these, and I think it's much more natural to do it in C++. The thing about banks doing systems in Java doesn't really convince me, the times I was facing a Java engine it didn't really matter how fast the thing was, due to the particular thing we were doing. (Not everything is a speed race). The thing about C++ is you get ultimate control, but you have to use it. For instance if you just write a dummy application where you populate a hashmap and pull out some values, it's easy to do this slower than a managed solution, because C++ allows you to leave out the allocator, meaning you end up using a default one that isn't so great. On the surface it will look like any old hashmap, because if you've looked at a few languages that kind of thing will tend to look like `map<mytype>` in most languages, but there's actually a way to say `map<mytype, myallocator>` in C++. I find it's actually easier to perf debug c++ than managed languages. With managed, you end up having to think about how the GC works, and the GC is actually not a very simple piece of software. You can sidestep the GC, but then you're not in a very idiomatic Java. There's a bunch of extra rules you have to adhere to.