It looks like something that doesn’t happen
Comment on An After-School Program Teaches Teens Java and Python
pivot_root@lemmy.world 7 months agoI get it, you have no idea what trying to optimize around an ever-changing JIT recompiler looks like
kaffiene@lemmy.world 7 months ago
Valmond@lemmy.mindoki.com 7 months ago
Found the guy thinking java can be as fast as C/C++
pivot_root@lemmy.world 7 months ago
The just-in-time compiler isn’t bad, but the rest of it is. An optimized hot loop has the potential to emit better instructions than a C/C++ compiler not using PGO, but you’re never going to see that in any real workload.
If you could rip out/avoid the garbage collector, give it the ability to use escape analysis to avoid heap-allocating every single object, and prevent it from implicitly making every function virtual, then maybe. But at that point, you might as well just a different language.
Valmond@lemmy.mindoki.com 7 months ago
Ha I love it when I’m right 😁😉
pivot_root@lemmy.world 7 months ago
There’s a difference between the JIT being able to emit better native code than an unguided compiler, and the language being as performant as another language. Java is never going to be as fast as C or C++, and that’s something you can blame its design for.
AeroLemming@lemm.ee 7 months ago
I think if your project is so performance-critical that small runtime changes can cause performance issues, Java (or any other garbage-collected language) isn’t a good choice. That’s not the case for the vast majority of projects.