It makes the claim that using const can improve performance. It doesn't properly substantiate this claim though, and it doesn't seem likely that it's true. It

It makes the claim that using const can improve performance. It doesn't properly substantiate this claim though, and it doesn't seem likely that it's true. It makes the same claim about code reuse, with the reasoning that code is more likely to be JIT compiled if it's a single hotspot rather than two, well, 'warm spots'. Again it doesn't properly back up this reasoning.