# I Have a dream! a Green dream -- Does Julia save energy?

**URL:** https://discourse.julialang.org/t/i-have-a-dream-a-green-dream-does-julia-save-energy/73188
**Category:** Performance
**Created:** [December 16, 2021, 8:53am UTC](https://discourse.julialang.org/t/i-have-a-dream-a-green-dream-does-julia-save-energy/73188 "2021-12-16T08:53:39Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![garborg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/garborg/32/11446_2.png) [@garborg](https://discourse.julialang.org/u/garborg)
#### Post date: [December 16, 2021, 2:52pm UTC](https://discourse.julialang.org/t/i-have-a-dream-a-green-dream-does-julia-save-energy/73188/14 "2021-12-16T14:52:32Z")

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> [@lmiq](#):
>
> In this one Julia is not initially present, but somewhere there one can find a link to an updated version in which Julia is included, and has a fair position:
> 
> [https://thenewstack.io/which-programming-languages-use-the-least-electricity/](https://thenewstack.io/which-programming-languages-use-the-least-electricity/)

Here’s the broader research page for the previously linked ‘Which Programming Languages […]’ article: [Original work in SLE'17](https://sites.google.com/view/energy-efficiency-languages)

In the updated 2020 results, only Rust beats (or matches) Julia for low energy use: [Original work in SLE'17 - Updated Functional results - 2020](https://sites.google.com/view/energy-efficiency-languages/updated-functional-results-2020)

If you interleave the 2020 results with the broader, original results, you’ll see Julia bested by C, Rust, C++, and Ada, but besting everyone else from OCaml to Fortran to Go to Java (especially considering the Java efficiency caveat detailed in: [https://www.sciencedirect.com/science/article/abs/pii/S0167642321000022](https://www.sciencedirect.com/science/article/abs/pii/S0167642321000022)).

And I assume Julia has made efficiency improvements since v1.3.1 and will continue to improve, so pretty cool. I didn’t assume it would be energy efficient compared to compiled languages w/ GC.

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