Add blog post “sustainable scala”

[julienrf]

May I ask a review? 🙏

[SethTisue]

This was really interesting reading.

One thing I'm wondering is:

I assume that in general, the longer a program takes to run, the more energy it's consuming. You write:

They compared the execution time, energy consumption, and memory consumption [...]

Did they ever find that execution time and energy consumption didn't simply vary in tandem? If so, then: in what way, under what circumstances?

Anyway, this is just something I was personally curious about. If you think other readers might be curious about it as well, you might consider answering it in the post itself.

[julienrf]

Did they ever find that execution time and energy consumption didn't simply vary in tandem? If so, then: in what way, under what circumstances?

The energy consumption is proportional to the execution time: Energy (J) = Time (s) × Power (W). However, it seems (based on the measurements) that the power is not constant, so the assumption “the faster, the greener” may be too simplistic, although it is often true.

[joroKr21]

I assume that in general, the longer a program takes to run, the more energy it's consuming. You write:

I think in benchmarks this might be true, but not necessarily in real world code. Think about async vs blocking database access. The async one might actually take a bit longer, but it consumes less resources (not blocking a thread) and intuitively it should also spend less energy per transaction.

[vincenzobaz]

Great article!

[SethTisue]

I put this up on Reddit at https://www.reddit.com/r/scala/comments/rgj6i1/sustainable_scala_blog_post_by_julien_richardfoy/ (hehe, the post title includes Wojciech, but only Julien made it into the URL)

@julienrf I assume scala_lang will tweet it out...?