There seems to be a perception that anything running on the JVM is going to be slow and look bad. Considering I work with Java every day in a gigantic Swing application, (IntelliJ IDEA, if you didn’t guess) and it has great performance for all the things it’s doing for me, that seems to be an old holdover from early days of Java. Also enterprise apps, which of course are going to be bad and slow. At least the JVM has real threads for background work which don’t take another 100MB of RAM like an electron background worker :)
Yea, its hard to wash out a stain like that, in general, JIT:d JVM based applications performs as good or better than AOT application, but do still need more memory.
The “or better” tagged into JVM applications really needs to go away. Realistically, most JVM applications do not have as good performance as native ones. Yes, it’s possible to run better, but it’s very hard to create code that JITs to something faster than a thing written in C/C++/Rust/etc. You have to basically write code that looks like C to make it run as fast or faster, because there’s real overhead that comes with a lot of things in the JVM. You don’t just write standard Java or Scala and suddenly it’s as fast as C++, in general. It’s still heckin blazing fast, to be fair, but not AS heckin blazing fast. (As long as you aren’t just going insane with objects, at least, such as huge lists of integer objects)
