2 ms·

The statement was that ZGC (or any JVM GC for that matter) is better than Rust’s GC, which is just naive ref counting. This is true - if we were to create a pro

by kaba0 4y ago

The statement was that ZGC (or any JVM GC for that matter) is better than Rust’s GC, which is just naive ref counting. This is true - if we were to create a program that allocates the same amount in both implementations, Java would win by a huge margin.

pkolaczk 4y ago
Have you ever tested it by yourself? I tested and no, it didn't win by a huge margin. Malloc+free was only a tad slower than the default Java GC new (stop the world, parallel) but the default GC is much faster than G1 and ZGC so I would not be surprised if malloc could beat those modern ones at allocation rate benchmark.
- kaba0 4y ago
  Do you have a public benchmark for that? It’s quite hard to write a benchmark that actually measures what we are interested in. Not doubting you, I would be interested only.
  - pkolaczk 4y ago
    This has been on my list of next blog posts for so long. But unfortunately no, not yet.