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C is one of the most energy saving language
(lemmy.world)
If you want top speed, Fortran is faster than C.
To run perhaps. But what about the same metrics for debugging? How many hours do we spend debugging c/c++ issues?
True but it's also a cock to write in
What if we make a new language that extends it and makes it fun to write? What if we call it c+=1?
This doesn't account for all the comfort food the programmer will have to consume in order to keep themselves sane
Machine energy, definitely not programmer energy ;)
I would argue that because C is so hard to program in, even the claim to machine efficiency is arguable. Yes, if you have infinite time for implementation, then C is among the most efficient, but then the same applies to C++, Rust and Zig too, because with infinite time any artificial hurdle can be cleared by the programmer.
In practice however, programmers have limited time. That means they need to use the tools of the language to save themselves time. Languages with higher levels of abstraction make it easier, not harder, to reach high performance, assuming the abstractions don’t provide too much overhead. C++, Rust and Zig all apply in this domain.
An example is the situation where you need a hash map or B-Tree map to implement efficient lookups. The languages with higher abstraction give you reusable, high performance options. The C programmer will need to either roll his own, which may not be an option if time Is limited, or choose a lower-performance alternative.
I understand your point but come on, basic stuff has been implemented in a thousand libraries. There you go, a macro implementation
And how testable is that solution? Sure macros are helpful but testing and debugging them is a mess
You mean whether the library itself is testable? I have no idea, I didn't write it, it's stable and out there for years.
Whether the program is testable? Why wouldn't it be. I could debug it just fine. Of course it's not as easy as Go or Python but let's not pretend it's some arcane dark art
Yes I mean mocking, faking, et. al. Not this particular library but macros in general
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For those who don't want to open threads, it's a link to a paper on energy efficiency of programming languages.
Results
For Haskell to land that low on the list tells me they either couldn't find a good Haskell programmer and/or weren't using GHC.
Also the difference between TS and JS doesn't make sense at first glance. 🤷♂️ I guess I need to read the research.
My first thought is perhaps the TS is not targeting ESNext so they're getting hit with polyfills or something
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Wonder what they used for the JS state since it's dependent on the runtime.
I guess we can take the overhead of rust considering all the advantages. Go however... can't even.
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For Lua I think it's just for the interpreted version, I've heard that LuaJIT is amazingly fast (comparable to C++ code), and that's what for example Löve (game engine) uses, and probably many other projects as well.
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and in most cases that's not good enough to justify choosing c
I wouldn't justify using any language based on this metric alone.
Ah this ancient nonsense. Typescript and JavaScript get different results!
It's all based on
https://en.wikipedia.org/wiki/The_Computer_Language_Benchmarks_Game
Microbenchmarks which are heavily gamed. Though in fairness the overall results are fairly reasonable.
Still I don't think this "energy efficiency" result is worth talking about. Faster languages are more energy efficient. Who new?
Edit: this also has some hilarious visualisation WTFs - using dendograms for performance figures (figures 4-6)! Why on earth do figures 7-12 include line graphs?
Microbenchmarks which are heavily gamed
Which benchmarks aren't?
Private or obscure ones I guess.
Real-world (macro) benchmarks are at least harder to game, e.g. how long does it take to launch chrome and open Gmail? That's actually a useful task so if you speed it up, great!
Also these benchmarks are particularly easy to game because it's the actual benchmark itself that gets gamed (i.e. the code for each language); not the thing you are trying to measure with the benchmark (the compilers). Usually the benchmark is fixed and it's the targets that contort themselves to it, which is at least a little harder.
For example some of the benchmarks for language X literally just call into C libraries to do the work.
Private or obscure ones I guess.
Private and obscure benchmarks are very often gamed by the benchmarkers. It's very difficult to design a fair benchmark (e.g chrome can be optimized to load Gmail for obvious reasons. maybe we should choose a more fair website when comparing browsers? but which? how can we know that neither browser has optimizations specific for page X?). Obscure benchmarks are useless because we don't know if they measure the same thing. Private benchmarks are definitely fun but only useful to the author.
If a benchmark is well established you can be sure everyone is trying to game it.
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For raw computation, yes. Most programs aren't raw computation. They run in and out of memory a lot, or are tapping their feet while waiting 2ms for the SSD to get back to them. When we do have raw computation, it tends to be passed off to a C library, anyway, or else something that runs on a GPU.
We're not going to significantly reduce datacenter energy use just by rewriting everything in C.
We're not going to significantly reduce datacenter energy use just by rewriting everything in C.
We would however introduce a lot of bugs in the critical systems
I just learned about Zig, an effort to make a better C compatible language. It's been really good so far, I definitely recommend checking it out! It's early stages for the community, but the core language is pretty developed and is a breath of fresh air compared to C.
Your link links to facebook that links to https://haslab.github.io/SAFER/scp21.pdf
Written in 2021 and not including julia is weird imo. I'm not saying it's faster but one should include it in a comparison.
And they used bit.ly on page 5 for references.
Haven't read it yet, but already seems very non-serious to me.
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this post was submitted on 11 Jun 2025
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