alt Hacker NewsTo those who don't know about compiler optimisation, the replacement with a closed form is rather suprising I'd say, especially if someone with Matt Godbolt's experience of all people is saying it is surprising.
Also this series is targeted towards more of a beginner audience to compilers, thus its likely to be suprising to the audience, even if not to you.
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CorrectHorseBat • yesterday at 6:41 PM
It's something we saw in highschool, I would expect anyone with a CS degree to recognize this optimization.
I barely know anything about compiler optimization, so I have no clue whether a compiler applying this optimization is surprising or something trivial.
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Gauss supposedly did it when he was 7. The hardest part for the compiler is figuring out that you have a loop that computes that sum and does nothing else important.