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by clouddrover 3307 days ago
> one should be able to make any real-world task take about the same time in any two languages.

I don't think that's a practical claim. Interpreted or JIT compiled languages depend on the interpreter or VM. JavaScript has become much faster over time as JavaScript VMs have improved, independent of the details of any particular JavaScript program. Ruby has become faster over time for the same reason. I've seen Ruby programs I've written speed up significantly without any significant code changes when I moved from an older to a newer version of Ruby.