Never? We already had this discussion about JVM, and we know for a fact that it's possible for JIT to achieve better performance with that damned bytecode compared to natively compiled equivalent.

It would be extraordinary to see a real world rust program use more memory than its JVM equivalent.

Let's not move the goalposts, the word in question is "performant".

Though even with memory it's not as clear as you assume in the context (which is about browser-based apps). Singular C/Zig/Rust program will surely be more economical than a singular in-browser app due to browser itself having a huge footprint. But what if said user has that browser open all the time anyway as probably most users do? What if there are more than one GUI-rich app, and with browser they share most of the overhead? PLs which allow low-level optimizations offer great opportunities, no arguing. But never say "never" until you know what exact problem yiu have to deal with.

> Let's not move the goalposts, the word in question is "performant".

Even though the word performance was used by a parent comment, I think they used it as an umbrella term. The article and most of the talk around rust discord is primarily about the memory. And JVM is probably the worst runtime you could pick if you care about memory usage.

Assuming this would make this comment less reasonable though. Optimization for memory usage is distinct from optimization for performance in our craft. And it's pretty basic thing.

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You cannot separate performance from memory usage. Usually less memory usage comes at the cost of performance and vice versa.

To be direct: this is utter nonsence. Memory usage and performance are different targets of optimization, which often at odds with each other.

I have seen it happen once in an LLM rewrite from java to rust. The modern JVM gc is actually pretty good.

Yes never

So fix the JavaScript abstraction. I've had more success with dart-wasm lately so I'm waiting for someone to finish the standards.

It's true that JavaScript costs, but the text renderer in Chrome is just wildly optimized and definitely can outperform an OS list view. An article here on HN covered it a while back.

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Do you have the link to it or remember what it was called?

The question is at what cost and at that level of both being optimal does it even matter to the user or is indistinguishable. There will always be 1% native apps that make sense, i'm talking about 99% of applications.