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Which has very disappointing benchmarks at the moment - even slower than some Python and Ruby stacks:

https://www.techempower.com/benchmarks/#section=data-r12&hw=...

I'm not sure why this is - I've Googled to no avail - but it is rather worrying.

I've been doing some work on these benchmarks. They appear really slow to me as well; I found the environment really hard to set up, though, so I haven't quite figured out how to identify why they're this way.

When you see Rust being "slower than Ruby" it's usually because you forgot to turn off debug mode.

Looks like they use build with release mode:

https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...

So it's important to not compare master to when the benchmark was posted; remember, they do them at a certain time, then work happens. So like, I sent a PR to update Rust from 1.0 to 1.6 at one point, for example.

That said, I don't think that missing out on --release was the issue here, as far as I know, it has always been on.

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