3 ms·

Both languages are used in high-performance servers (where you know Ruby or Python won’t cut it). HotSpot has a reputation of being close to a Sufficiently Sma

• Zababa 5y ago
  My mental model would be, from lowest to highest peformance, something like Ruby/Python < JavaScript < Java/C# < Go < C++/Rust. From what I understand, Java is a huge improvement over Python, Ruby and even JS, but is still not the same as Rust, C++ or even Go. Still, those are rough indicators, and not absolute truth. Yon can usually go really far before being stopped by the absolute strict limit of a language. For example, here's a post about Discord switching from Go to Rust with great success https://discord.com/blog/why-discord-is-switching-from-go-to-rust https://discord.com/blog/why-discord-is-switching-from-go-to..., and here's another about how CockroachDB optimizes Go https://www.cockroachlabs.com/blog/how-to-optimize-garbage-collection-in-go/ https://www.cockroachlabs.com/blog/how-to-optimize-garbage-c.... In the same vein, there's Shopify AOTing Ruby using Sorbet and LLVM https://sorbet.org/blog/2021/07/30/open-sourcing-sorbet-compiler https://sorbet.org/blog/2021/07/30/open-sourcing-sorbet-comp.... All of that to say that I'm not surprised that Rust has better defaults compared to Java, as Rust is supposed to be faster, and option types are a code Rust language feature, while they are a relatively recent addition to Java.
• pjmlp 5y ago
  With the small difference that Rust lacks 25 years of libraries for every kind of enterprise use case, battle tested in production. Beating Java with optional values is nice, but meaningless.