3 ms·

I bet they used a bit of sun.misc.Unsafe too https://blogs.oracle.com/javamagazine/the-unsafe-class-unsafe-at-any-speed https://blogs.oracle.com/javamagazine/t

• taion 6y ago
  Less than you'd think – it comes up in serializing/deserializing data, somewhat, because JNI has a fair bit of overhead, but this isn't really like Rust's "unsafe". To have fast Java, you really need the JIT to be happy, and that's not a safe bet if you're doing random things with Unsafe.