How is Ruby Different in Japan?

And why does anybody care? For the same reason I have these conversations. Because the American style of Rails usage lends itself to throwing huge amounts of memory and concurrency at your problems, and the Japanese style of Ruby usage does not. This normally comes up when they ask, "but why can't Ruby just use JIT?" JIT is pretty memory-intensive. It's great for running a web server. It sucks for... Well, let's look at what the Japanese folks do, shall we?.