Interesting comparison: Which Programming Languages Use the Least Electricity? – The New Stack
There is this comparison which includes Julia (there it ranked well):
From the same authors:
Is there actually any expected platform dependency for power consumption ( ARM, AMD64,Linux Win… ).?
For the tests they used a Linux Ubuntu Server 16.10 with 16GB RAM and an Intel(R) Core™ i5-4460 CPU @ 3.20GHz only.
I’m thinking it would be based on how well a laguage exploits archetectuer, so something like RISC wich is a type of assembler, and works with ARM would be near the top. But, Julia should be high for high level languages.