this post was submitted on 15 Sep 2025
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[โ€“] LeFantome@programming.dev 4 points 15 hours ago* (last edited 14 hours ago) (1 children)

think it's fair to say performance rust is hard to write

This situation proved exactly the opposite.

They wrote a utility to pass functional tests. It did. Then people said it was too slow. So, in just a few days or hours, they dramatically sped it up while still passing the tests.

Seems like it was pretty easy to write fast Rust code in this case.

[โ€“] chocrates@piefed.world 1 points 7 hours ago

Fair point. I am mostly going on what I have seen others do on streams when comparing rust and go. Go seemed faster to get good performance and rust sometimes had to write a ton of code to get the same performance.

I don't know if you can selectively not use Go's garbage collector, but that seems to be the only reason Go might be theoretically slower than rust.