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> but could you write an "AAA" video game in it?

Perhaps not, but an extremely large percentage of commercial indie games are written in managed languages.

My chief worry over Go at the moment isn't that is has GC (for the most part), but that the GC it does have is relatively dumb.

The GC in Go 1 is a bit smarter than it used to be, and it is going to be even smarter in Go 1.1, this things take time, and the current GC works quite well for most people. Also Go gives you control over memory layout, which allows you to avoid some GC issues that are much more difficult in languages like Java.

You can avoid those things in Java as well, by adjusting settings. Adjusting eden and generation sizes with generational GC is a bit of an art for all but the simple cases.

Yes, but they tend to be relatively trivial (in terms of performance) in comparison to AAA titles.

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